Need Help to recover from failed bios update on MSI AM4 mainboard

Dear community,
i tried yesterday to update my bios to the latest version on an MSI AM4 X370 SLI Plus mainboard.
The process completed but the mainboard stopped working.
It looks like I flashed the wrong bios since I got a warning and ignored it unfortunately.
I tried to inform myself in order to recover the bios but I dont know where to start to be honest.
my bios chip is a MX25U12873FM2I-10G and there also are jspi connector I could use.
I ordered a Flash BIOS USB Programmer kit you can see on the picture below and should get it today but Im not sure if it will work because I read somewhere that I would need a 1,8 V adapter for AM4 or something like that.
Im really confuse and would appreciate any help from you