Aatube

https://support.discord.com/hc/en-us/articles/1500005292701-How-to-Access-an-Age-Restricted-Server-FAQ clarifies that Discord would only do that for servers that otherwise violate the Community Guidelines’s provisions on adult content, whose only mention of which I quoted above.

Server owners must apply an age-restricted label to any channels that contain sexually explicit content involving adults or content involving adults that is shared solely for the purposes of sexual gratification.

nothing else needs to be age-restricted, and age restriction of topics you mentioned would be big news for discord. pluralkit’s home is discord and has great influence there, and the lgbtq+ community definitely has a larger presence than the plural community

only changes for the unverified:

• Channels, servers, and commands set to age-restricted will be inaccessible
• DM requests deemed “sensitive” will be inaccessible
• “Sensitive content” will be blurred
• Won’t be able to become a speaker in “stage” channels, a special type where a few videoconferencers have a meeting where anyone else can watch and type but not videoconference; verified watchers can be invited to speak
• DMs from unfamiliar users will be routed to a separate “warning”

nothing else

I think this is business as usual…