How to filter messages in Get outlook mail messages using wildcards and variables

How to filter in Get outlook mail messages activity using wildcards and variables?

we can do that using for each and if activity but without using that how can we filter inside Get outlook mail messages activity

any suggestion

There is dedicated property built with get outlook mail message activity.
Filter - A string used as a filter for the messages to be retrieved.

For the reference

you could try with like operator
item.Subject Like “RPA*”