I thought it makes a big sense to write documents on PC and then view it elsewhere out there but developers don't seem to care about that usage.
Docmost makes tables completely unreadable on mobile having words wrap at the width of the device, especially when set as full-width which actually makes it even tighter for some odd reason.
Affine doesn't even support mobile at all and the GitHub issue about it is starting to age well.
AppFlowy does it the best of the bunch but it requires an app and it has minimal tablet support having only mobile app view than a native tablet view but at least it's usable having tables actually horizontally scroll as anyone would expect.
Outline isn't any better and a small test showed some weird behavior under mobile.