This is how it looks like, the left side not works from bottom to top the blue line is like a border

Hi, I mean they are working when i change the language of the keyboard. But i have tried to press the left side a bit harder it was glitchy but it worked for few minutes. I though ok I fix it but i did not... I was so angry like when i touch the left side a bit harded it starts randomly glitching the screen I dont know if it can be something with the Ios15 beta but I downgraded now to Ios 14 and it's still glitchy... I dont know what to do

:(