The LTE interface does not go up.
I’ve tested it with several cards and the result is the same.
model = D53G-5HacD2HnD&FG621-EA
version - 7.15.2
version LTE - 16121.1034.00.01.01.04
/interface lte
set [ find default-name=lte1 ] name=lte2
/interface lte apn
set [ find default=yes ] use-network-apn=no
add apn=internet
/interface lte
set [ find default-name=lte1 ] allow-roaming=no apn-profiles=internet band=“” sms-read=no