Letsencrypt sync Cert to another Sense as Cascade

[opns_neuling]

Hi!
I have a case here with 2 opnsense (cascaded connected).
One of them has public IP and the second is supposed to be attached to the DMZ.
Letsencrypt is up and running on the first opensense.
I would like to sync the certs with renewals to the second opensense, and start the GUI again (so the letsencrypt certs are used for the GUI in the second router) .... is that possible?
Thanks a lot

[opns_neuling]

nobody ?