Atlyss fulfills all of those.

https://www.pixiv.net/en/artworks/85300814

On mobile, click “Show all” then scroll down to the second from the bottom image.

Source is Maykon Replay.

TikTok: https://www.tiktok.com/@maykonreplay

YouTube: https://youtube.com/@MaikonAlvesdubstep

Source: https://youtu.be/26AhefM_NyM

Apparently a real Australian safety sign: https://www.royallifesaving.com.au/stay-safe-active/communities/multicultural-communities/how-to-stay-safe (scroll down to the “Out and about” section)

Strawbebeh: https://linktr.ee/strawbebeh

And the original post on reddit.

Yeah, it just shows that the artist 麵包 (https://www.pixiv.net/en/users/11500734) posted the original picture.

Someone on twitter posted the most likely source: https://www.pixiv.net/en/artworks/87271896#manga

It looks like this isn’t actually from the original show.