Many thanks for all help.
Last time I use a VirtualBox (Win11), but if I open the Brother Software it say can not work because problem.
Maybe I test is with VirtualBox and Win7
Oh, I forgot, I have change Solus from Xfce to KDE Plasma.
I found a Brother Labelprinter (PT-P900w) with driver.deb, maybe it works with Solus?!
I will check some things ....
many thanks