For me, I usually just remove the maintenance plan. The workouts completed will stay on the calendar. Then I can restart the maintenance plan again if need at the beginning of set it to end where I want depending on my goal. If I need an off period, I star at the beginning, if I need a bridge, I start in the middle.
The other option, that I’ve done for future planning when I know I have a few short weeks (≤4 weeks) is copy and paste the workouts I want to use and then remove the plan. The copied workouts stay behind. I find it useful but because of the work, need it to obviously be short.