I have two teams in two different leagues with openings. Both leagues are IDP dynasties on Fleaflicker the scoring is slightly different in each. Both leagues normally have their rookie/FA draft 2 weeks after the NFL draft. There is a brief waiver and FA period after the draft and players then lock until week 3 of the preseason.
https://www.fleaflicker.com/nfl/leagues/105778/teams/747539 filled, thanks Cadence Calls!
https://www.fleaflicker.com/nfl/leagues/121018/teams/860110 filled, thanks Mhors!
Both teams have all their original picks.