Wicked, fully FOSS for non-console targets, I had some fun with earlier this year, it's a great very-modern full-featured D3D-or-Vulkan renderer under active development with a lively yet cozy-sized community (including a handful of folks taking care of the Linux side). The API is easily learned and can be operated via your game code from Lua or C++ or a mix, as you see fit, with Lua scripts being executable also in Wicked's editor app (Windows/Linux).

My hunch is that by sticking to just Windows/Linux/consoles and firmly-decidedly-skipping other cross-platform platforms such as Apple's Metal, mobile's OpenGL, WebGL/WebGPU/WebAssembly, it is kept maintainable, unbuggy (not 100s of bug-tagged Open Github Issues) and capable of ongoing rapid feature iteration.