I still have the same problem with no solution after the last update...

It's so FRUSTRATING working with this ... and insane!

Can you imagine if you paint a painting and you don't see the size and type of your brush in your hand ????

... and if you work and earn a living with this ???... (madness)

My settings:
16-inch MacBook Pro 2019
RAM 64 GB 2667 MHz DDR4
2.3 GHz 8-core Intel Core i9
SO Catalina 10.15.7 (19H2)
AMD Radeon Pro 5500M 8GB
All the latest versions of the full Adobe CC package

PLEASE Adobe, hurry up and SOLVE your problems, because users paid all the years a lot of money for Apps WITHOUT PROBLEMS and they should not correct their jobs with this pain, it is impossible to do the jobs correctly with many problems on their machines and it is very frustrating for us.

KILL our creativity when you focus all the resources of your mind on poorly executed applications with so many problems and dysfunctions ...

PLEASE !!!

Following... having the same issue on dell 9500 

I realize this is a known issue that started a release or so back. I just downloaded the latest version of PS  22.1.0 20201125.r.94 2020/11/25: 4b16c876033  x64 and the issue is still not fixed. I am running PS on Win 10 Pro Version 2004 (OS Build 19041.685)

Just upgraded to Big Sur on new 2020 imac and same problem. I really rely on the red indicator for hardness when using the alt+mouse left/right to change the hardness of the brush.

it's a known issue they are working on it

Known issues in Photoshop (adobe.com)

I have the same problem with the brush.

But the red preview works in the liquify windows.

@JeffreyTranberryKnown issues in Photoshop (adobe.com) 

My photoshop no longer shows the red preview of the brush's hardness (alt + right click mouse), I don't know how to make this preview appear in red again. Can someone help me?

Nearly a month, other patches/updates and still no fix? This makes 22 unusable for many people. Any sort of ETA on when this will be resolved? 

Same problem here. First I thought it was my update of MacOs to Big Sur, but it is not I can see. Frustrating that Adobe 'fixes something that ain't broken'. And this feature is NOT a niche feature! Adobe please step up and increase your quality control.