Fixed.
The master cylinder seemed to be the culprit. Didn't initially fix it, but after some more bleeding today, I finally have a stiff pedal. Even though I got no visible/audible air out of the system while doing so(weird). Took it out for a test drive everything seems perfect. Initial bite is right where expected, no problems. Haven't activated ABS again yet, but there was tons of traffic. I'll try that tonight and if that goes well, I'll go through the brake burnishing process in the service mode of the car so I can bed in the new rotors/pads. I can't run the Tesla Toolbox 3 tests again to see what my pressure is at because my subscription expired, but it is working great. Thank you all for your assistance!
I am still running the cheaper Prestone DOT4 fluid for now, but I can atleast make it to my alignment appointment tomorrow! I'll wait until the week before my next track day to swap out to the RBF 660 because if I have to bleed one more brake line this week I'll go insane. LMAO
As far as the best brake bleeder I've found to use in case anyone is curious I highly recommend the FirstInfo A1163HK that can be purchased on Amazon. It has fittings for every Tesla and 5 other fittings for various vehicles. It holds high pressure GREAT, has a nice convenient shut-off valve, pressure release button, the works! If you have a Motive bleeder already you can just purchase their adapter A1163HKT3, but you'll need a quick disconnect fitting to make it fit the hose on the Motive bleeder. The fitting is a little uncommon I think though, because I haven't seen that one anywhere else before, maybe its proprietary. It also comes with three different quick disconnect fittings for other types of adapters you may already own. Quality piece of kit with lifetime parts warranty through manufacturer according to the material inside the box. The cap is amazing, and doesn't leak any air or fluid. It's also aluminum so it should stand up to repeated uses quite well.
I know the Motive bleeder is very popular among enthusiasts, myself included in recent years, but the two I purchased leaked around the gage area. Maybe it's because the Tesla requires you to pump it to 30 psi instead of like most cars I've done in past which is 15-18psi. The gage itself didn't leak, but the fitting through the plastic bottle with no rubber seal of any kind there(horrible design imo). Could probably be fixed with 2 rubber washers sandwiched in between 2 flat washers and then the sides of the fitting. I purchased 2 and they both leaked. I also tried the Aries 70921-2 bleeder and it was garbage. Links below to the FirstInfo products I'm referring to.
Bleeder kit: (It comes with the Tesla cap so you don't need to buy it separately if you go this route)
Standalone Master cylinder Cap:
Do not buy this 3L FirstInfo bleeder, because the quick disconnect will not fit their own Tesla Model 3 specific fitting
Thanks again everyone for your assistance/guidance through this ordeal. Glad to have this project completed.