How many rounds for a startup draft?

Yoyoyoyo foot clan. I have joined a 10-team, 2qb superflex Dynasty Start Up league and we are currently set to do a start up draft with 21 rounds. My question is, is that on the low side round wise? I’m new to dynasty so I have no idea, but to me I feel like the start up draft should be 25+ rounds, right or wrong? Thanks in advance.

Yes it is. It should be 25-30 active roster and then taxi for 12 team leagues. Since yours is only 10 team that is very shallow rosters