In the official devtalk forum, core developer Jeoren Bakker asked Android users to support Blender's Android port with a playstore app (no Fdroid that I found) named 'Vulkan Caps Viewer'.

I believe Lemmy to be specially of interest due to the possibly higher percentage of more niche phones.

How to:

1. Install the app
2. Check the top to find a green text 'Device already present in database'
3. If it says so, there's nothing to be done, you can uninstall the app. No need for you to do steps 4, 5 nor 6
4. Otherwise, I believe it is needed for you to upload the GPU compatibility with the top leftmost button (I did not have the option so I'm not sure) (also I see people also sharing a link to their specs, so not sure)
5. Then, after that sign up / log in to the devtalk forum and publish a comment stating your phone brand and model, and if given, the link with the info
6. Then you can uninstall the app

More info in the official link provided.

If I got any of the steps wrong, please do correct me.