Assuming that you have Wi-fi and that your Kindle is compatible with it. Someone with a hardwired-only connection, an older Kindle that doesn't support Wi-fi at all, or one that doesn't support WPA3 will be stymied.
(The models that don't support Wi-fi at all originally had cellular service for wirelessly downloading books, but that was sunset a few years ago. So there will be literally no way to copy new books to those devices anymore.)
Yeah and Amazon stopped supporting those kindles too. My Kindle 4th gen no longer connects to the hive even with WiFi. It's not a cellular model (and I think they had dropped that option by then anyway). It's still the old non-touch UI though.
Apparently it needs to be "up to date" but because Amazon no longer publishes firmware updates, it is not.
(The models that don't support Wi-fi at all originally had cellular service for wirelessly downloading books, but that was sunset a few years ago. So there will be literally no way to copy new books to those devices anymore.)