Can I Share the single captive portal authentication to entire internal netwroks?

I have following network topology.

Router R1 (Mikrotik 1036) wan port connected to internet through ISP modem.
LAN1: Connected to wan port of Router R2 (EG210G-P), WAN IP: 192.168.100.2
LAN2: Connected to wan port of Router R3 (EG209G-S), WAN IP: 192.168.100.4

LAN3: Connected to wan port of Router R4 (EG209G-S), WAN IP: 192.168.100.3

Each Router R2, R3 and R4 has Private network for internal use with the subnet 192.168.110.0/24 and
each have separate guest network (guest vlan)  for visitors to access internet and Ruijie cloud capitive portal is enabled.
- Each R2, R3, R4 wan is connected with the lan subnet of Mikrotik Router R1, NAT is disabled and static routing has configured.
What I want to achieve is:
Just enabled the ruijie cloud capitive portal in R2 router only, and share this hotspot authentication to other wings Router R3 and R4.
How can I achieve my goal with this topology? Is it possible with the Ruigie EG devices?

hi，sir

u can configure the captive portal authentication in gateway device(EG210G-P)

but，portal authentication can only be performed if the traffic passes through EG210G-P. If the user uses another ISP, the portal page will not pop up.

best regards

Alan