I don't see any issue how is its performance compromised ?
You have no idea of knowing if the sidewall enforcement in that tire has been compromised.
Agree, one can't see if the structure beneath the sidewall rubber covering is damaged or compromised, for now.
Hence, request for pictures was made prior.
However, until and unless the sidewall structure (which lies inside) encounters prolonged exposure to the external elements ......
and this has to happen through cracks or penetration through the rubber sidewall coverings (which isn't visible for now if it ever it exists) .......
for a prolonged period of time in units of month ,if not a year.
By then, the pre-conditions for eventual failure of tire structure would have been met.
This stage is yet to come, if it ever comes .... as far as OP's tires is concerned.