PPPOE and Hotspot in mikrotik single interface is possible, but what if I am using hotspot from other system running in Raspberry pi? So the setup is PPPOE from mikrotik and hotspot
MIKROTIK ميكروتك: PPPoE Server Setup with Profiles
gadgetXplorer: Setup a PPPoE Server Using Mikrotik RouterBoard 750
High-level RouterOS PPPoE Server/Client Configuration Example - ePMP - Cambium Community
PPPoE Server Configuration in MikroTik Router – Know
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PPPoE Client on router A, physical connection to modem on router B - MikroTik