re-sizing the brush

One thing to note is you only get the "Red preview" if the brush is a round brush (computated brush) like under General Brushes.

what happens if you change the brush overlay color to a different one?

i am using English keyboard only

For re-sizing the brush i am using "control+option+left click"

Please help me sort out this problem 

Thank you in advance

What language is your OS set to? What language is your keyboard set to?

What keys are you holding to resize the brush?

I think this issue might be related to this: https://community.adobe.com/t5/photoshop-ecosystem-bugs/p-shortcuts-don-t-work-anymore-after-upgrade-to-macos-monterey-i-use-non-english-keyboard/idi-p/12549109

Yes Grapichs Processor is checked.....

Go to Preferences > Performance.... Is Use Graphics Processor checked?