Of course. The increased number of failures due solely
to solder joints has kept many a service department busy.
Reworking with "decent" solder is the simplest treatment.

Not in Europe it isn't. There are heavy fines for doing that.

How would the government know? Are there solder Nazis breaking into service
shops, looking for rolls of illicit lead-based solder?

I hate callbacks. I would use lead-based solder on repairs.