But I want to know what wallet are you using?
Tell me please which wallet should I use? Which will allow me to send 0.0000004 BTC.
But of course you need to customize the mempool to 1sat/vbyte. Since not all the wallets I mentioned here have the mempool set directly to 1sat/vbyte, you need to customize it.
Tell me please which wallets support this customizing?