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shape surface selection filter from flexible modelling will not work for normal editing features. it may be good idea to make a shape surface selection filter for normal editing features (or club both filters).
If you are intending to submit an enhancement request, you need to use this link:
https://community.ptc.com/t5/Creo-Parametric-Ideas/idb-p/creoparametric
You should provide as much detail on why it is needed and some insight into the implementation such as typical use cases.