[BUG] Pachli and SSO / OIDC with authentik and webauthn as 2FA

[Morethanevil]

Describe the bug
I use SSO on Mastodon and wanted to test it with Pachli. I enforce 2FA in authentik via webauthn (Yubikey, passkey)
Pachli opens my sign in website from authentik, but it refuses to load the prompt from android for webauthn. Instead, Pachli simply tells me my browser would not support it. I have Firefox and Brave as browser, both have no problems with webauthn and I can log in without issues.

To Reproduce
Steps to reproduce the behavior:

1. Try sign in via SSO
2. Choose webauthn as 2FA (I used a Yubikey)
3. See error

Expected behavior
After successful password prompt, Pachli should load the webauthn prompt

Screenshots or video
n.a

Links
n.a

Versions

Latest from Playstore 2.8.3
Android 14
Oneplus 9 Pro (LE2123)
Mastodon 4.3.1

Affirmation
I have checked other issues for this project (open and closed) and I cannot find one that matches the problem I am reporting.

Found no existing or closed issues for SSO or OIDC

[nikclayton]

Does it work if, on the login screen you:

1. Enter the server name as normal
2. Instead of clicking the "Login with Pachli" button, use the three-dot menu at the top right and choose "Login with Browser"

?

[Morethanevil]

Yes this works, the browser can login without ptoblems and I only need to authorize Pachli.