Perhaps we're getting hung up on terminology? Some Model 3's definitely observed a 5% increase in their "software range estimate" (state of charge expressed in terms of distance).
Did release 2019.5.15 increase the range?
My understanding is that this the +5% "software range estimate" is associated with Tesla reducing the battery's reserve capacity. If the 0% SOC number is linked to a certain battery voltage X, then if you change that 0% SOC critical battery voltage number to say 0.99*X, then there would be more actual amp-hours available between 100% and 0% SOC. So if these assumptions are correct, the +5% range would be a real-world thing, not just a scaling factor on SOC.
There is definitely evidence both for (post linked above) and against (me) this change. Some have suggested this may be regional or dependent on some other factor. So, literally... YMMV.