I was going to have my brake fluid bled along with my oil change. Except the first one broke my mechanic tried. Was afraid to try and break the others. He checked the fluid and it was in good condition however. I'm wondering a few things. Is this something to not worry about until a caliper actually needs replacement? Then is there something to safely put on the other ones in case the system needs bled? The previous owner always bled the system every couple years and I did on previous cars as well. The pads and rotors were both replaced and slides cleaned/lubed. Should this be ok or is flushing that fluid something of concern on these cars? Thank you.

Soak the broken piece with Kroil or PBlaster and use an easy-out. I'm sure others will chime in with different things to try.

Thank you I was unsure what if anything could be used for fear if it could contaminate the fluid.

New or junkyard calipers are fairly cheap. I would just replace it honestly.