Replace BIOS Flashback button (ASUS)

Replace BIOS Flashback button (ASUS)

On my ASUS Strix X570-F motherboard the BIOS flashback button is broken. I would like to avoid a repair via ASUS, because I expect that it could become more expensive. So I ordered such a button now and wanted to solder it in. But I don't get the solder liquid with my soldering iron. How can I unsolder the switch?