I have no balance to check it, so please can you tell me if the wallet supports coin control for on-chain transactions? I could just fund my wallet and then try to see if I can choose coins, but I can't fund it at the moment, so I would appreciate it. Thanks.
Aqua wallet doesn't have coin control yet, but you can easily move coins or import keys to Blockstream Green desktop wallet and use coin control.
This wallet should be mainly used for L-BTC and L-USDT, and I suggest moving to hardware wallets for on chain Bitcoin.
For me Aqua is great wallet for situations like this when fees on chain are high.
The LN implementation is very good imo. The best I have ever seen.
If you only want to use Lightning Network I think that Phoenix wallet is better for that, and it will have cheaper fees.