apache reverseProxy how to proxypass to multi virtualhosts on same localhost and port?

Question

I have an HTTPD apache reverse Proxy in a docker container on my PC. It manages also the authentication toward openidc sso. Because I need to configure 3 different SSO on same host I configured 3 virtualHost in HTTPD.conf. I need that the first one redirect towards the 2 other depending on sub-route path. Here is my configuration :

<VirtualHost *:80>
    ServerName ${MON_IP_HOST}
    OIDCProviderMetadataURL http://SSO1…….
    <Location />
        #public
    </Location>
    <Location /api/SSO1/login>
        AuthType openid-connect
        Require valid-user
    </Location>
    ProxyPreserveHost On
    ProxyPass /api/sso2/login  http://internal_sso2/api/sso2/login
    ProxyPassReverse /api/sso2/login  http://internal_sso2/api/sso2/login

    ProxyPass /api/sso3/login  http://sso3_local/api/sso3/login
    ProxyPassReverse /api/sso3/login  http://sso3_local/api/sso3/login

    #--- main proxy pass ---
    ProxyPass / ${banckendapiurl}
    ProxyPassReverse / ${banckendapiurl}  
</VirtualHost>

<VirtualHost internal_sso2:80>
    ServerName internal_sso2
    OIDCProviderMetadataURL http://SSO2 ……
    <Location />
        AuthType openid-connect
        Require valid-user
    </Location>
    ProxyPreserveHost On
   ProxyPass / ${banckendapiurl}
   ProxyPassReverse / ${banckendapiurl}   
</VirtualHost>

<VirtualHost sso3_local:80>
    ServerName sso3_local
    OIDCProviderMetadataURL http://SSO3….
    <Location />
        AuthType openid-connect
        Require valid-user
    </Location>
    ProxyPreserveHost On
    ProxyPass / ${banckendapiurl}
    ProxyPassReverse / ${banckendapiurl}   
</VirtualHost>

And the /etc/hosts file contains :

127.0.0.1   localhost  sso3_local  internal_sso2

But when I call from a web browser the routes : /api/sso2/login or api/sso3/login They both forward to the second virualhost only because it is defined in second position (if I place it in third position both call redirect toward sso3_local )

So what is wrong and how can I correctly prowypass internally to several virtual host ?