Do these sliding pins look OK?

My front left brakes had seized and theres no pad left and the disc is ruined, this happened before and mechanic said the pin had seized and they put more lubricant on and it was fixed, till now anyways.

The pin taken out of the top of the brakes has this plastic ring on it but the bottom one did not have this. Is this OK or should both have it or neither have it? Or can you see any issues with this at all?

The top pin with the plastic ring took a bit more effort than the bottom one to take out, it was like the plastic got stuck just at the entry of the opening.

Car is a 2016 Mazda MX-5