Eachine h7/ Star Flip drone MT99xx prtocol rate ch

I have this eachine or jjrc or star flip (can be by under many names) H7 quadcopter using MT99xx protocol. I ve selected on radiomaster TX16S..(latest multi modul fw) MT99xx and H7 subprotocol and i can control AETR direction and flip on ch5 but cannot select the rate on CH6..it is always on high rate (or speed mode) also dont know which channels works with trim. Board labeledd MT9913 R2..maybe need a previous version multi modul fw?
I ve read this but cannot found info for change rate CHannel.
www.multi-module.org/using-the-module/protocol-details/mt99xx