Responded to @vattuvarg:
@vattuvarg on the Mikrotik side you need to setup this https://help.mikrotik.com/docs/spaces/ROS/pages/26476608/Failover+WAN+Backup along with an LTE modem on a port. Consider the updated models like https://mikrotik.com/product/sxt_lte6_2023 with two SIM slots.