With a LND node is recommended to always have one UTXO with no more than 100k sats for the anchor reserve.

If you do not have that UTXO, in case of closing channels or even force closures, you will not be able to bump the fee.

To swipe all the sats from a UTXO to open a channel, I suggest to use Zeus connected to your node. Zeus have that option.

But keep in mind; always leave just one UTXO with no more than 100k sats in your onchain wallet node.