Configurable JWS algorithm for decoding an OIDC back-channel logout token

Expected Behavior

Analogous to

    @Bean
    public JwtDecoderFactory<ClientRegistration> idTokenDecoderFactory() {
        OidcIdTokenDecoderFactory idTokenDecoderFactory = new OidcIdTokenDecoderFactory();
        idTokenDecoderFactory.setJwsAlgorithmResolver(clientRegistration -> SignatureAlgorithm.<...>);
        return idTokenDecoderFactory;
    }

there should be a possibiliy to change the used JWS algorithm when decoding an OIDC back-channel logout token.

Current Behavior

If I'm not mistaken it's not easily possible to change the default algorithm JwsAlgorithms.RS256 in NimbusJwtDecoder (see org.springframework.security.config.annotation.web.configurers.oauth2.client.OidcBackChannelLogoutAuthenticationProvider#OidcBackChannelLogoutAuthenticationProvider).

Please let me know, if the algorithm can be set.

Context
The OIDC IdP (OpenID Connect Identity Provider) will not change the used JWS algorithm for the logout token.
Current workaround: the required classes from Spring Security were copied and modified. This is not a viable long-term solution (at least for me).

Thank you for your help!

Start at org.springframework.security.config.annotation.web.configurers.oauth2.client.OidcBackChannelLogoutAuthenticationProvider#OidcBackChannelLogoutAuthenticationProvider and inspect how NimbusJwtDecoder uses JwsAlgorithms.RS256. Compare this with OidcIdTokenDecoderFactory#setJwsAlgorithmResolver. Done means callers can configure the JWS algorithm used to decode an OIDC back-channel logout token without copying Spring Security classes.