@elysiuMAccording to a user from a russian forum, the published stock firmware (28.10.23) does not match the device and will brick it! We have to wait until the correct firmware is released or someone finds another solution...
https://4pda.to/forum/index.php?showtopic=1088113#entry129825636
Don't know if it is useful, but here you can get latest stock firmware for the Transpeed M98-8K PLUS:
https://drive.google.com/file/d/1TUFhd1Y24rMWS46MacF04fJSosWfKAKR/view
Open Source Version of Allwinner PhoenixCard to Dump, Unpack, Flash Allwinner IMG Files on Linux:
https://github.com/YuzukiTsuru/OpenixCard