Danmaku Unlimited 4 was announced recently by Sunny Tam, and is available to wishlish on Steam. The standout feature seems to be a blade attack very similar to Akai Katana Shin, with most of the visual theming remaining the same with the previous entries, just in more quality.
Sunny Tam's Bsky post:
https://bsky.app/profile/sunnysytam.bsky.social/post/3lvlysxdh2c2p
DU4 Steam Page:
https://store.steampowered.com/app/3575710/Danmaku_Unlimited_4_WYVER_ULTRA/
While I'm here posting I still don't recommend Touhou 20: Fossilized Wonders due to use of generative AI (Adobe Firefly) for some stage background elements. If you want a new Touhou to play, why not try
"Blue devil in the Belvedere"
https://store.steampowered.com/app/1365750/__Blue_devil_in_the_Belvedere/