This is intended in order to prevent accidentally changing PerfectMatch segments, which should be closed to perfect.
100% or Context Matches can be auto-propagated if you use the option to Auto-propagate to confirm segments.
If you want a feature to allow auto-propagating such segments please raise this request on the ideas forum for Trados Studio:
https://gateway.sdl.com/apex/communityknowledge?articleName=000004766 or vote for existing ideas if there are any.