How to sync Let's Encrypt configuration to slave

[Deal12]

Hello to all,
I have this problem: I have installed and configured the Let's Encrypt plugin to use HTTPS for some services and everything works great.
I also configured HA proxy and everything is ok but let's encrypt configuration it is not possible to synchronize it with my second backup node as it does not appear among the selectable items in the high reliability menu.
How can I do it in such a way that I switch to the second node also through this I can use HTTPS?

Thank you all.
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