I was wondering how to get it so that the +/- split delta thing to always show up, not just a few seconds before the split ends, as my splits don't actually show the previous split since it's small so it doesnt really cover up the screen, also I just think it looks nicer

I don’t think that’s possible. The delta only shows up once you reach the time that your “best segment” would have finished and then it starts ticking until you finish the segment. Showing all the time would be just duplicating the data of what’s shown on the previous segment (and there’s no way to know your segment’s pace until you eclipse the best segment time). If you want the delta to show up all the time, just show more than one split at a time on the screen.

Showing just one split at a time doesn’t really provide the viewers or yourself with anything meaningful (since as you’ve discovered you can’t show your delta all the time for the current active split). Splits are mainly informational, so not showing a decent amount of that information is kinda against the main point of them. If you want to show such little splits on your stream, then I would either not use splits and just use a timer with no segments, or use splits but only capture the actual timer in your layout.