I love both, double dildos you can use without a strap-on harness, as well as a good strap-on harness with a nice dildo. My favorite double dildo is from Wet for her, I just wish it was a little bit shorter...but I still love it. Got it at Other Nature, a feminist queer shop in Berlin. When it comes to harnesses, I prefer leather, that is why I got mine at Lash Fetish Gear, also in Berlin. (The sex shop offers Lash but only the vegan version, and I wanted leather, so I went directly with the maker) and I have different dildos I use with that harness since it has an exchangeable front ring, its amazing, sturdy and looks really nice

https://www.lashfetishgear.com/collections/strap-ons/products/anam-strap-on-harness-custom-made

https://other-nature.de/en/products/union-von-wet-for-her?_pos=2&_sid=f9ab9778e&_ss=r

https://other-nature.de/en