I believe what are you looking for are 'swap' services that facilitate the exchange of lightning sats and onchain sats. There are few, like Bisq, Robosats, Boltz, sats.mobi Telegram bot. They all vary somehow in the way they operate.
You should also be aware, that #AlbyHub is a lightning node thus also a bitcoin wallet (with an onchain balance, key ownership, control).
Your sats are either locked in channels, that enable lightning network and transactions, or reside (so to speak ;) ) on your onchain address, from which you can open a channel or send out elsewhere.
Opening channel is kind of native swapping-in from onchain to lightning
Closing channels otherwise - when channels is closed, sats from this channel are landing on your onchain balance.
That's easier than it sounds ;)
Hope that helps!