Sure, I can help you with that!
The answer to your question is yes, a non-Dolby Vision 4K Blu-ray player can output a Dolby Vision signal to a Dolby Vision-compatible TV. This is possible because Dolby Vision content on non-Dolby Vision 4K Blu-ray players has a base layer of standard HDR10, which most HDR TVs support. When playing Dolby Vision content on a non-Dolby Vision 4K Blu-ray player, the player will default to HDR10, and you'll get 10-bit color depth, but that's about it since your TV doesn't have Wide Color Gamut (WCG) and is dim.
However, it's worth noting that to get the full Dolby Vision experience, you'll need a Dolby Vision-compatible 4K Blu-ray player and a TV that supports Dolby Vision. This will allow you to enjoy the full range of colors and brightness that Dolby Vision has to offer.
In summary, while a non-Dolby Vision 4K Blu-ray player can output a Dolby Vision signal to a Dolby Vision-compatible TV, it's not the ideal setup for the best possible Dolby Vision experience.