In tiktok they work as on instagram so they are not clickable on the captions or comments of a post, only on the bio.
But if he is changing the link in his bio too often and doesn't let the hive one there then he should put them in both places even if they don't work (are clickable) that way if a person is really interested they can try and write down the url, cause if he sends them to his bio but the link is not there either is pointless.
Or he could use a linktree in his bio that way it would allow him to add more than just 1 link to his bio.
Just checked the bio on tiktok can hold multiple links.
We will take that into account moving forward.
Thx for pointing it out.