Screen Mirroring not showing device options on iPad 12.9 Pro

I have own my Ipad 12.9 Pro 4th gen for almost 2 years. I have never used screen mirroring until last September. I used it to connect my LED it was working fine. My ipad screen was showing on LED. But when I tried connecting it second time in January, it didn’t connect. The screen mirroring wasn’t showing any Device options. Today I tried my connect my zoom like from my laptop to ipad through airplay. And today as well the Screen Mirroring wasn’t showing any device options. I have tried everything. From restarting my ipad to try connect it to multiple different devices but it’s just not working. All the devices are connect to same network. In my country Pakistan we don’t have apple stores. So I don’t know what to do?

[Re-Titled by Moderator]