Based on your past post and video nearly two years ago, I see an improvement. It sounds like free mounting may be the one thing that is holding you back from greater distances. My suggestion is to concentrate on free mounting. Just keep after it till you can do one free mount, then simply repeat a thousand times to get relativity proficient. That method worked for me and I’m older then you. I learned to free mount a 36er but I still am not good at doing a normal mount a smaller uni (I rarely ride one either).
As far as riding greater distances, a suggestion would be to always look and concentrate on riding to a distant point rather then looking directly in front of the uni.