Depends on how recent the wallet was last synched but it takes a bit, just as syncing from a Bitcoin core node takes a bit. There are light wallet solutions akin to Electrum for bitcoind like Edge wallet but similar to Electrum there are major tradeoffs privacy wise.

You could hypothetically run a node on a phone if it has enough storage (around 260gb unpruned last time I checked) but similar to Bitcoin core (about 570gb last time I checked) storage is the limiting factor.

Most node in the phone LND implementations rely on light wallet syncing like Electrum or Neutrino nodes.