Originally, https://www.reddit.com/r/RepTronics/ was the place for electronics. But they have turned into a place for airpods.
To find a larger variety of electronics you can check out https://hwsource.com.
Another good trick is to have a look at [https://reparchive.com/feed/live](RepArchive Live). Electronics are really popular and you'll catch some cool stuff.
added: 7/7/2023 , modified: 7/7/2023