ESPHome Device Builder not showing in add-on store | Home Assistant | Page 1

hi all, trying to install the ESPHome Device Builder add-on and it looks like my add-on store is in some way borked. things I've tried:

I'm running an rpi4 but on aarch64, not armv7, so my architecture should be supported
exec'd into the supervisor docker container and checked out the contents of /data/
store.json is nowhere to be seen, which I'm told is not the case in a working install (thanks dad). I can't actually find store.json anywhere but I'm hesitant to just create it from scratch myself
ha store lists the following for repositories:

repositories:
- maintainer: you
  name: Local add-ons
  slug: local
  source: local
  url: https://home-assistant.io/hassio
- maintainer: unknown
  name: unknown
  slug: 5c53de3b
  source: https://github.com/esphome/home-assistant-addon
  url: https://github.com/esphome/home-assistant-addon
- maintainer: Music Assistant <marcelveldt@users.noreply.github.com>
  name: Music Assistant
  slug: d5369777
  source: https://github.com/music-assistant/home-assistant-addon
  url: https://github.com/music-assistant/core
- maintainer: Home Assistant
  name: Official add-ons
  slug: core
  source: core
  url: https://home-assistant.io/addons
- maintainer: Franck Nijhof <frenck@addons.community>
  name: Home Assistant Community Add-ons
  slug: a0d7b954
  source: https://github.com/hassio-addons/repository
  url: https://addons.community

the esphome repo shows up as maintainer: unknown name: unknown which I don't think is right. but if I try to delete and re-add I get Error: Can't remove built-in repositories!

I've also repaired the supervisor, rebooted the host a handful of times, reloaded the store, etc, etc

#ESPHome Device Builder not showing in add-on store