Auto-post new TikToks, per platform
Each platform has its own "Auto-post new TikToks" switch, so Facebook, Instagram, YouTube and Pinterest can run independently.
Facebook, Instagram, YouTube and Pinterest each have their own "Auto-post new TikToks" switch: the Post to tiles in Settings → Posting schedule, or that platform's settings (click its card) in Settings → Accounts & platforms. Turning one on means a new TikTok Shop video you post is automatically cross-posted there, inside your posting hours and daily limit; turning it off means that platform waits for you to post it yourself from Composer. A new video with no TikTok Shop product waits for you to post it, unless your Settings shows Include new videos without a product and it is on (never to Pinterest) (see The new video notification). A TikTok Shop video whose product TikTok hasn't shown us yet posts on its own once we find the product, when that is within 2 days of your TikTok post.
The four switches are independent — you can auto-post to Facebook and YouTube while leaving Instagram and Pinterest manual, for example.
Turning a switch off also stops automatic posts already waiting in the queue for that platform: they are kept, not deleted, and each one asks you to choose Post anyway or Cancel (the bell counts them too). Turning the switch back on lets them go out as planned — see Automatic posts waiting because auto-post is off. Where it is turned on for your account (rolling out), the same goes for posts Keep my gaps filled added, and it plans nothing more on a platform while its switch is off — see Fill my week.
YouTube's automatic post title is built from your TikTok caption. If a video has no usable caption, EverySqueeze doesn't invent one — that video is skipped for YouTube until you add a title yourself. The description is your whole TikTok caption, hashtags included (links are taken out, and Remove TikTok hashtags in YouTube's settings drops the TikTok-only tags), with your Amazon link block added as set in Your YouTube description template.
Pinterest needs its boards first. Its switch is in Pinterest's settings (and on the Pinterest tile in Posting schedule). If your boards aren't saved yet, turning it on opens board setup with Enable automatic posting when saving this board setup already selected: choose your boards and press Create boards & save, and the switch is on. Once your boards are saved, the switch turns Pinterest on and off by itself.
The Posting schedule screen's master Auto-post new TikToks switch can still pause all of this at once — see The automatic posting switch. Daily limits and posting hours apply on top of these switches — see Daily limits and Posting hours.
More than one TikTok account
If turning a switch on or off for one TikTok account turns it on or off for the other one too, it is the YouTube or Pinterest switch, or the master switch in Posting schedule: YouTube and Pinterest have one switch for all your accounts, and the master switch pauses every account. Only Facebook and Instagram can be on for one account and off for another.
With more than one TikTok account connected, Facebook and Instagram auto-post is set for each TikTok account by itself, so one account can post to Facebook while another doesn't. On the desktop, choose the account under Edit auto-posting for in TikTok's settings, and the Auto-post new TikToks switches in Facebook's and Instagram's settings follow that account. In the phone app (the cog, then Accounts and platforms), Facebook and Instagram each list one switch per account under Auto-post new TikToks from: turn on every @name whose videos should post there. YouTube and Pinterest have one switch for all your accounts: turning either on or off changes it for every TikTok account together, and there is no YouTube or Pinterest switch per account. Every account posts to the same Facebook Page, Instagram, YouTube channel and Pinterest (see Add another TikTok account).
Older videos follow the same per-account switches: with Post older videos on, an older TikTok goes to Facebook or Instagram only when its own TikTok account's switch for that platform is on, and an account with the switch off (or never turned on) has none of its older videos posted there. Turning one account's Facebook or Instagram switch off also holds that account's older videos already scheduled there: each one waits for Post anyway or Cancel, and turning the switch back on lets them go out as planned.
Just turned a switch on?
A switch covers the TikToks that arrive after you turn it on. A video EverySqueeze already brought in while the switch was off is not queued when you turn it on, even one you posted on TikTok that morning: post it yourself from Composer (or its card in the phone app's Posts). Older videos can also go to Facebook and Instagram through Post older videos (see Older videos per day).