Hello IliasKoukoumatsas, welcome to the Microsoft community, I'll be happy to help you today;
I understand that you are having display issues on Edge;
What exactly is the model and manufacturer of your graphics card?
Before answering the question I suggest you try the following;
Reset Edge settings;
Open Edge and go to Settings;
Click on Reset settings in the menu on the left of the screen;
Click on Restore settings to their default values;
Confirm the operation;
Then repair Edge;
Press Windows key + i and go to Applications;
Select Microsoft Edge from the list and click Modify;
Click Repair;
After the end of the process, open Edge and check if the display issue is fixed;
See you soon!