LoRa without TTN/TTS/Chirp direct to MQTT?

Hi all,

usually I try to dig into new tech by myself without asking forums. This time i think i am in kind of a dead-end.
My Idea was to connect my LoRa-Device to my wAP Mikrotik router and create an event-driven script to gather LoRa Data from my device and directly forward payload to an MQTT server without taking a detour to TTN/TTS. This would keep my data private without using any cloud, etc.

Unfortunately it seems, my Mikrotik router cannot directly accept the join request from my device, but only forward that to a network server. So my question is: Is there any (third-party) package that can accept LoRaWan join-request-packets (including encryption) and forward the payload directly on the router ?

Thanks for help.

Unfortunately it seems, my Mikrotik router cannot directly accept the join request from my device, but only forward that to a network server.

It is as you say.
You will not be able to install such a package (3-d party one) on RouterOS.
Only MikroTik “made” (official) packages are guaranteed to work with RouterOS.