there seems to be a trend where bitcoin holders want "use" their bitcoin and layers like botanix / citrea etc seem to be taking this direction to make bitcoin more useful in defi scenarios
On GitHub, I can see that it is an open source wallet. But I do not know how to check the code myself if truly it is open source or not. Is it fully open source?
The wallet has many support for bitcoin layer 2 like the lightning and the liquid network which are the two commonest among them. I can also see others like Ark, Spark, Botanix, Rootstock which I did not know they are existing. If the wallet is open source, it will be a good wallet.
Yep. 100% open source from day 1
We have also just updated with bitcoin based USDT layer, furthermore there is support for testnets too (ie. Citrea)