Face ID not working properly or malfunctioning

Hi, I have an issue with my Face ID and was wondering if anyone has the same problem?

I have an iPhone 11 Pro and I have had it for almost 2 years now. I've never damaged or had my phone repaired by anyone but just today my Face ID seems to be playing up. It seems the camera doesn't detect me of some sort and it takes too long to open with Face ID. Instead, I have to enter my passcode all the time. Same issue happens when opening apps that require Face ID.

I restarted my device and the issue gets resolve for some time. But after not logging in for a few minutes the Face ID plays up again. I also tried resetting Face ID in settings but a message appears saying "Face ID is not available - Try setting up Face ID later". Seems like restarting my device only seems to do the trick, but only for a couple of minutes.

I contacted apple support and they said it could be a hardware issue, but it feels more like a software concern. Is anyone having the same issue? And is it because of the new update?