Why phone's screen is not working if I use two fingers

@pankuvlogs sounds to me like your touchscreen is no longer working. I suggest that you start by restarting your phone. Next, you want to check if your phone's software is outdated. Go to "Settings" > "Software update" and check for any available updates. you could also try a factory reset, but make sure that you have all of your files backed up since you will lose those. Use the instructions from sites {https://www.androidsettings.net/xiaomi-r... |like this] and many others. Make sure that read and understand which files and access you will lose. You must now your passwords etc. If you do not have those, you may get locked out of your phone or certain apps.

If none of this worked, then it is most likely a hardware issue. The touchscreen and the display are fused together and should be replaced as one unit. Since iFixit does not yet have a guide for this, Use something like this video or even this one Replacement display assemblies are readily available at plenty of online stores. I would suggest you pick a seller within your geographic region. That way, if anything goes wrong with your order etc. you do not have to wait forever.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.