Transmit traffic from a specific machine to wireguard (192.168.1.10)

[JustOxygène]

Hello first of all I want to apologize I think the subject is not in the right section but I did not find the section for wireguard and this section seems to be closer to my problem.
Currently, my network is like that.

                                          lan server                           Lan domesti

Wan --------------> pfsense ------------------------------------> ipfire -------------------------------->
ppoe. 192.168.1.0/24. 172.18.0.0/16

IP ipfire Lan pfsense = 192.168.1.10

My goal is to make pfsense connect to wireguard and tell the machine in the lan server (192.168.1.10 and the ipfire router) that it must go through wireguard except that I don't know how to do it.

For information I am French but I say to myself that I would have more chance to have fast answer on the English community still sorry of the blow for the not very reliable translation

Thank you in advance for your future answers