Out of ideas for fixing fingerprint after screen replacement

Hey all,

Simialar questions have been asked but no answers provided for my specific issue on them.

I got screen bleed after dropping my phone on holiday, got the screen replaced at a tech shop and now have multiple issues.

1. The fingerprint won't work: I don't get any error messages or mentions of fingerprint whatsoever, the option is totally gone from the security settings. I've tried to recalibrate the fingerprint sensor multiple times and had no issues with that process - it just doesn't do anything to bring it back. I've rebooted multiple times, factory reset the device and still no luck. It's like fingerprint never existed.
2. Phone is heating up more than usual when it isn't running much in the background, even now it's factory reset.
3. Battery drain is huge from whatever is going on in the background, even when idle and no apps running.
4. Screen is super laggy when typing and also if I try to watch a video on YouTube I notice it lags a lot.

I've tried all the suggestions on here from similar posts and issues, but having no luck at all. The store have told me they put on an official Google screen, but I'm not sure if it's another issue causing this or if I just don't believe them haha. Any help or advice is much appreciated. Would this be caused by the fingerprint sensor being damaged in the screen change? They said they transferred the old sensor to the new screen. Or what would potentially cause all of these issues?

Thanks in advance 🤞🏾🙏🏾