destination NAT on cisco ASA over VPN

My DMZ = 100.64.0.0 /24
We wanted to reach 172.20.20.10 which is on the customer side but this conflicted with a network on our side.

Decided to use 172.22.20.10 as a NAT IP.


Changes on my side

object-group network MY_LAN
 network-object 100.64.0.0 255.255.255.0

object-group network NAT_NET
 network-object 172.22.20.0 255.255.255.0

Added below to VPN ACL
access-list CUST_VPN_ACL extended permit ip object-group MY_LAN object-group NAT_NET

no nat
nat (DMZ,OUTSIDE) source static MY_LAN MY_LAN destination static NAT_NET NAT_NET no-proxy-arp route-lookup

Customer side:

Added to vpn
access-list MYSIDE_VPN extended permit ip object-group NAT_NET object-group MY_LAN

HOST_REAL_IP = 172.20.20.10
HOST_XLATED_IP = 172.22.20.0 /24

nat (WIFI,OUTSIDE) source static HOST_REAL_IP HOST_XLATED_IP destination static MY_LAN MY_LAN

I could ping 172.22.20.10 and it responded.