Cell phone constantly disconnects from Wi-Fi?

My question is actually already above, but I'll explain it a little more precisely.

My phone (Huawei P30) often disconnects from my Wi-Fi. I've had this problem for a long time, but since updating to EMUI 11 the problem has only gotten worse.

After my phone has disconnected from the WLAN, I go to the settings and in the list of all available WLAN devices, it says "Denied Access to Network" (my phone's language is English). And that happens at least once or twice every hour.

I also contacted Huawei support some time ago, but the tips the supporters gave me were not helpful.

Another piece of information that might be helpful. When I still had Android 9, there were no problems. Then I registered for the Android 10 beta and then installed it. I've had this problem ever since.

I thank you for any help.

I have a cell phone repair shop and a lot of people with this cell phone had the problem if you are interested you can write to me on Inatagram called ronize.neli