It seems to be that Resizing a Device Partition but most likely works in old installation done originally to RancherOS and maybe also with BurmillaOS 1.9.x.
This is because of mkfs.ext4 and e2fsck versions:

It is already fixed in Debian 12 so #196 will fix this for future version but to BurmillaOS 2.0.x this most likely will not be ever fixed.
Workaround is: