Ok I figured out how to bootstrap an Ergo node via nipopow and UTXO set snapshot on mobile. So far it is working with rocksdb node 5.1.2.
Because leveldb versions are not working with aarch64 for some reason for me, even if I try the aarch64 release.
The only small issue is that termux does not have glibc (it uses musl libc like Alpine linux), so rocksdb does not work out of the box... Just need to setup an arch linux proot to run it.
I will make a step by step instruction soon and add nipopow config to the ergo node android app when I figure out best settings.