Let me know how you go. I’m stuck on Graylog 4.3.11 waiting for free resources on a hpysical host with AVX instructions to move to mongodb 5+ and GL 5. Might just build an all new setup also and move to OS Graylog 5+ mongo 5+ etc. Also would like to move to Ubuntu 22.04 but seems not offically supported by even mongodb 6 yet.