Hi @aconticisco
The Phase 1 settings on your ASA must match the AWS peers Phase 1 settings and the Phase 2 settings on your ASA must match the AWS peers Phase 2 settings. If you meant locally on each device whether the Phase 1 and 2 settings need to be identical then no, they do not. The IKEv2 SA (Phase 1/INIT) and IPSec SA (Phase 2/AUTH) as separate tunnels, negotiated with the ciphers defined.
If you are seeings encaps counters increase but no decaps, then it's possible an issue on the AWS side, perhaps the return traffic is being NATTED or not routed to the VPN tunnel.
HTH