Asymmetrical shape on a mirrored mesh

Hi There!
I’d need to apply some asymmetrical shape modifies on a mirrored mesh.
How could I reach this result?
Thanks in Advance!
Have a great 2021!!!

Modifiers affect all the modifiers above them so simply put your modifiers below the mirror modifier.

See examples:

Bool after mirror, the mirror modifier only affects modifiers above it.

Bool is now mirrored because it is above the mirror modifier.

Thanks for replying!
A mesh geometry modeling which doesn’t affect the previously mirrored one,
was what I really meant with my request.
( I’d like to damage just one side of a bumper created with the mirror modifier)
I hope there’s a way to do that.
Thanks in advance!!!