Trump used TikTok to campaign.
He wasn't able to campaign by using traditional media.
He had to use alternative media and TikTok helped him to win the election.
IMHO, it won't be missed (except by woke and social justice warriors, trying to make $$$$ with silliness).
Someone will come up with an alternative, so the silliness can continue.
TikTok was a hotbed of support for Trump. And it was also a VERY big part of black males getting behind Trump and him getting the biggest black vote since the early 1950s.