OIDC headers with Apache rewrite

[pmkolo]

I'm quite sure I do so something wrong, but can't figure out where/why, so need to ask the experts here:

This works, I get all the oidc headers in backend app

<Location /path1>
    AuthType openid-connect
    Require valid-user
    ProxyPass http://127.0.0.1:5000/path1
    ProxyPassReverse http://127.0.0.1:5000/path1
</Location>

<Location /path2>
    AuthType openid-connect
    Require valid-user
    ProxyPass http://127.0.0.1:5000/path2
    ProxyPassReverse http://127.0.0.1:5000/path2
</Location>

When trying to combine these into a single block, no oidc headers are set, well at least not propagated to the backend. I just get the 'mod_auth_openidc_session' cookie, but that's part of the user's request anyway, not injected as the headers

<LocationMatch "^/(path1|path2)">
    AuthType openid-connect
    Require valid-user
    RewriteEngine On
    RewriteRule ^ http://127.0.0.1:5000%{REQUEST_URI} [P,L]
    ProxyPassReverse http://127.0.0.1:5000/
</LocationMatch>

Using also this extra setup
OIDCPassClaimsAs both
OIDCClaimPrefix "OIDC-"

Would you be able to provide any help/hint how to pass the headers to the backend with that rewrite rule?
Thanks