Meta Business Suite covers the basics for Facebook pages, so start there and keep one content calendar per page so nothing lands on the wrong one. Where it gets annoying is when you also want the same content on other platforms. Upload the original file rather than a watermarked download, tweak captions and hashtags per platform, and watch aspect ratio and length (Reels and Shorts have different limits). If you run several pages, space the posts out instead of blasting them all at once. I built PostOnce.to for the cross-platform part: it auto-crossposts your own videos and posts between TikTok, Instagram, YouTube, Facebook, X, LinkedIn, Threads, Pinterest and Bluesky, usually within about 10 minutes of posting, without the TikTok watermark. It can also schedule and re-publish older posts, and there's a 7-day free trial if you want to test it.