Similar issue with mine: MacBook Pro 2020 13 inch MXK32 Touch Bar 1.4GHz/i5/8GB/256GB running Big Sur 11.1.
After updated to 11.1: everything is normal.
On Saturday (9 Jan): everything is normal.
On Sunday (10 Jan): I turned on the mac by opening the lid as normally do, and all of sudden, the screen flickering to the extent that it is almost unusable.
I have tried every tips and tricks found on the net, including those from this forum, but the problem remains unsolved.
mradhi
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Bandung, West Java, Indonesia