IDS/IPS on seperate hardware from router

[mni]

Hello, total beginner with OPNsense. Just ordered an APU2 board with 3 NICs for my home network, 250/250.
Would like to set up OPNsense and preferably some IDS/IPS to learn network security/monitoring. From what I understand the APU2 board has not enough CPU power do to real time traffic analysis. I have a Proxmox server running with a comet lake intel i5. Is it possible to offload the network analysis to my server somehow?

[banym]

Maybe you have a switch with mirror port functionality

[Tempora]

I used to run a APU2C4 board - It ran Suricata just fine but took some tweaking and careful rule selection.

As above, you'd want to configure a port mirror (aka SPAN). Then you can use something like an all one package such as SecurityOnion.