Although a product has been patented by others and is now abandoned, then:
If the patent he applied for has not been made public or announced, then you can definitely apply for this patent again.
If the patent he applied for has been published or announced, you can make appropriate improvements (in structure or appearance) to the products involved in the patent, although you can't apply for a patent for the same content. If the improvement is in structure, then your improvement must produce technical effects (technical effects that the original patent can't achieve). In this way, you can apply for a utility model patent or an invention patent for the improved part.
If the improvement is in appearance and shape, then the shape of your improved product must be very different from the original product, and the difference condition is that ordinary consumers can clearly distinguish it. So you can apply for a patent for design.
Okay, that's enough. I wish you can achieve your goal.