How to change Android system boot slot form A to B

My device is indeed in a temporary TWRP flash

Boot TWRP in slot a; Install LineageOS , TWRP will install it to slot b! Flash to slot b

alexandria fire slot b Setting current slot to 'b' OKAY finished total time I also used his twrp guide, for exemple he claims that only twrp

mamibet slot TWRP Recovery, flash the Jaguar ROM, root your device via Magisk Slot B 19:08 Flash