I went straight to the Disney Afternoon shows from back in the day. Chip N Dale Rescue Rangers, Tail Spin, Darkwing Duck etc. Each show stated off with a premiere “movie” that was broken up into 5 parts the first week they launched. Those are all missing and the shows start with the first episode from the following week.
The premiere for Darkwing Duck is apparently marked on Disney Plus as episodes 29 and 30 (Darkly Dawns the Duck). I haven't checked the others you listed.