Organic and MagicEarth work fine for me. I really wonder if it is just my setup or if everyone else suffers from this. I am on a Pixel 5 with CalyxOS using the OSMAnd+ from Fdroid (but same with normal OSMAnd from Aurora)
The map rendering of OSMAnd is faster than Google Maps (using a 3+ year old smart phone with a low-end Realtek SoC). Like really way way faster/snappier.
My setup is a Chinese brand Android 10 with default OS (rooted)and OSMAnd+ from Fdroid.
The only possible cause I could think of is that CalyxOS is somehow missing proper video drivers for your Pixel?
https://github.com/osmandapp/OsmAnd/issues/12046 https://github.com/osmandapp/OsmAnd/issues/13254
Edit: If that is not the culprit then check if OpenGL rendering is activated.
You can also deactivate unneeded features from being rendered (buildings, areas, etc). And lastly there are smaller road-only maps (no POI data and no adresses though)
What really matters is the amount of data. In my local town I can scroll around no problem, but in a more actively mapped area like Amsterdam it takes at least couple seconds to load.