The B58 4 cylinder is sold with both auto and manual transmissions, this is the list for the 248 bhp version
2016–present G30 530i
2016–present F22 230i[10]
2016–present F32/F33/F36 430i
2018–present G01 X3 xDrive30i
2018–present G02 X4 xDrive30i
2020–present G01 X3 xDrive30e (PHEV Version)
And the 228 bhp version...2014–present F56 MINI JCW Hardtop and JCW Cabrio (320 Nm)[9]
2017–present F56 MINI JCW Clubman and JCW Countryman ALL4 (350 Nm)
2015–present F22 225i
2016–present F48 X1 25i/28i
2017–present F39 X2 25i/28i
2019–current F44 228i Gran Coupé xDrive
So I don't see any problem for MMC to offer a nice, slick BMW manual box.
Without going nuts and checking out every model you mention, how many of those are in-line rear wheel drive?