are there like any ROMs that Support being rooted and still lock the Bootloader? i have tried LineageOS and CalyxOS but neither of them worked, Lineage just refused to lock, and calyx startet bootlooping with the Message “no operating system found”

better yet is there any ROM that comes pre-rooted?

cause i need a locked Bootloader or otherweise WhatsApp (which i unfortunately need) wont work, but coming from a rooted rom, unrooted android is unbearable