All MikroTik devices come with some kind of default configuration. There are several different configurations depending on board type:

CPE Router;
LTE CPE AP router;
AP Router (single or dual-band);
PTP Bridge, W60G Bridge (AP or CPE);
WISP Bridge (AP in ap_bridge mode);
Switch;
IP Only;
CAP.

You can run the command /system default-configuration print to see the exact applied default configuration commands.