ppa:mozillateam/ppa gone?

I am trying to install firefox in a arm64 Ubuntu 22.04 Docker container from the mozillateam ppa, but it seems not to be available anymore. I also could not find it searching it manually at https://launchpad.net/ubuntu/+ppas.

Is the ppa really gone?

root@efb6e2e122ee:/home# add-apt-repository -y ppa:mozillateam/ppa             PPA publishes dbgsym, you may need to include 'main/debug' componentRepository: 'deb https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/ jammy main'Description:Mozilla Team's Firefox stable + 115 ESR and Thunderbird 115 stable buildsSupport for Ubuntu 16.04 / 18.04 ESM is included.More info: https://launchpad.net/~mozillateam/+archive/ubuntu/ppaAdding repository.Found existing deb entry in /etc/apt/sources.list.d/mozillateam-ubuntu-ppa-jammy.listAdding deb entry to /etc/apt/sources.list.d/mozillateam-ubuntu-ppa-jammy.listFound existing deb-src entry in /etc/apt/sources.list.d/mozillateam-ubuntu-ppa-jammy.listAdding disabled deb-src entry to /etc/apt/sources.list.d/mozillateam-ubuntu-ppa-jammy.listAdding key to /etc/apt/trusted.gpg.d/mozillateam-ubuntu-ppa.gpg with fingerprint 0AB215679C571D1C8325275B9BDB3D89CE49EC21Hit:1 http://ports.ubuntu.com/ubuntu-ports jammy InReleaseHit:2 http://ports.ubuntu.com/ubuntu-ports jammy-updates InReleaseIgn:3 https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu jammy InReleaseHit:4 http://ports.ubuntu.com/ubuntu-ports jammy-backports InReleaseHit:5 http://ports.ubuntu.com/ubuntu-ports jammy-security InReleaseIgn:3 https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu jammy InReleaseIgn:3 https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu jammy InReleaseErr:3 https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu jammy InRelease  503  Service Unavailable [IP: 185.125.190.80 443]Reading package lists... DoneW: Failed to fetch https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/dists/jammy/InRelease  503  Service Unavailable [IP: 185.125.190.80 443]W: Some index files failed to download. They have been ignored, or old ones used instead.

I experience the same issue in my x86_64 Ubuntu 22.04 VM.
I also get a 503 when I try to do

add-apt-repository ppa:ubuntu-mozilla-daily/ppa 

of https://launchpad.net/~ubuntu-mozilla-daily/+archive/ubuntu/ppa that seems to exist certainly. Maybe there currently is an issue with launchpad?