I don't typically use My Feed and normally would not notice if it disappeared, but in the interest of trying to help out I've been experimenting on my units.
On my two units where 2020 Tokyo Olympics had been automatically installed, My Feed is nowhere to be found and I have not found a way to bring My Feed back.
On my Streaming Stick (3600) My Feed had not yet been replaced by 2020 Tokyo Olympics, I was able to add 2020 Tokyo Olympics by methods listed in earlier posts and have both My Feed and 2020 Tokyo Olympics available. It will be interesting to see if this Roku subsequently receives an update that wipes out My Feed.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
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Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X