@the_rockhas given the correct link and @Dmitryfd as I said unfortunately its not possible without those efforts. I am not sure how do you exclude the IP address from community the way we do it on mgmt server. I use to do the same way. exclude the echo-request from vpn community and then PING if that succeed then add it in community again.
Or here is one more trick. NAT the traffic going to PEER IP Address behind other IP and you should be able to ping to Peer IP like this
Lets suppose your encryption domain is 10.1.1.0/24
FW IP is 184.108.40.206
Peer IP is 220.127.116.11
Then nat one of the IP fro 10.1.1.0 like 10.1.1.100 behind 18.104.22.168 - Since now 22.214.171.124 and 126.96.36.199 is not a part of vpn tunnel you should be able to ping from encryption domain.