49ers Secondary Depth Chart right now

Healthy cornerbacks on their 53 man roster - Josh Norman

Emmanuel Moseley designated to return from IR. He had an ankle injury and has been out since 12/5.
K'Waun Williams entered the COVID protocols on Monday Jan 3rd. He may be eligible to return for the Sunday's game.
Dontae Johnson (D mostly special teams entered the COVID protocols on Monday Jan 3rd. He may be eligible to return for the Sunday's game.

Thomas and Lenoir entered Covid protocols on Wednesday the 5th. If they have to sit out 5 days that should include Sunday the 9th. These two are both rookies.

Jason Verret tore his ACL week 1 and is out for the season.

At safety, FS Jimmy Ward entered the COVID protocols on Monday Jan 3rd. He may be eligible to return for the Sunday's game. His backup Jarrod Wilson is fine. He had been up and down on the Jets roster/practice squad. The Jets waived him Dec. 7th.
Both strong safeties, Tartt and Hufanga were limited in practice on Wednesday.
SS Tavon Wilson was designated to return on Monday. He is 31 and was originally mostly a special teams player but moved up due to injuries.