Our goal is to mirror traffic from ports Ethernet6/16 on both Nexus to port Ethernet6/15 on 7k1-access.
There is no problem for SPAN configuration for port Ethernet6/17 on 7k1-access, therefore I want to focus on other nexus.
Ports Ethernet 6/17 are physically connected each other. We see traffic on Ethernet6/17, but nothing on Ethernet6/15

Configuration
n7k2-access
interface Ethernet6/16
description internet
switchport
switchport access vlan 363
no shutdown
interface Ethernet6/17
description Remote span to N7k1-access
switchport
switchport monitor
no shutdown
monitor session 1
source interface Ethernet6/16 both
destination interface Ethernet6/17
no shut
7k1-access
interface Ethernet6/17
description Remote span from n7k2-access
switchport
no shutdown
interface Ethernet6/15
description spanport to VDI server
switchport
switchport monitor
no shutdown
monitor session 1
source interface Ethernet6/17 both
destination interface Ethernet6/15
no shutdown