Sure, you can repost TikTok content anywhere, but what people really notice when they recognize that tiktok's algorithm is unique—without realizing it—is that it's apolitical by default, and not-western when politics come into play. It actually shows you what you're interested in, instead of force-feeding western progressive/consumerist messaging and banning half its users for wrongthink.
So yeah, post the same content on Reels/Shorts if you want, but if it doesn't align with the western narrative, good luck with the shadowbans and downranking.