@scattergather @tek @moshidon @apps I managed to temp fix the Official Mastodon app by manually installing the cert for Sectigo [1] waiting for tusky update to get pushed to f-droid. My fix doesn't help with fedilab but since it fixed the official Mastodon app maybe it will work for moshidon.
[1]https://www.sectigo.com/knowledge-base/detail/Sectigo-Public-Intermediates-and-Roots
[2]https://intranetssl.net/faqs/how-to-install-root-intermediate-ca-certificates-on-android