Front side parking sensor dropped inside

I have a DS7 performance LIne 2021 the front right side parking sensor has dropped inside and is still active
Can I get to it inside to replace it in its hole ?
can the front wheel arch trim be removed to access the sensor easily?
Should a mechanic do the job?
Thanks for any help
Martin

Our local Citroën Garage fixed it took off the Wheel, undid the wheel arch support (3 screws) released a bit of the wheel arch surround and accessed the sensor which was orighinally glued on and the technician clead it and re-stuck it
30 mins total
30 euros charge ---- so solved
Martin

The sensor itself is not glued, only its mounting is glued to the bumper.