If you're looking to prevent or bypass ISP detection using MikroTik devices, it's generally about hiding or masking certain behaviors that may trigger traffic inspection from the ISP. There are several techniques that you could implement in MikroTik routers to reduce or obscure your network traffic patterns. Here are a few methods:
https://github.com/UnknownSojib/MikroTik-Anti-ISP-Detect/blob/main/MikroTik%20ISP%20Bypass.txt