The expectations are too high. Tindall is one of about 20 LBs in a deep LB class drafted this year. 3 of the 20 are starters currently, the 2 first round picks, Quay Walker (Tindall's former teammate) and Devin Lloyd, and the surprise 6th round pick Malcolm Rodriguez for the Lions. Troy Andersen (the kid I wanted at 50 before the Tyreek trade) started twice (and looked great, to be fair) as an injury replacement, but once the starters recovered, he's back on special teams duty. All the others are still mostly on special teams with the occasional defensive snaps here and there. Muma, Chenal, all of them. Heck, Nakobe Dean, who was touted as a future star, but slipped on draft day due to false rumors about needing surgery (he didn't), he played 3 snaps on defense in the first half of the season. He was the other starter ahead of Tindall at Georgia.
Tindall was one of the more raw prospects of the class with the least amount of experience. A slow start shouldn't surprise anyone.