Please check your photo links. Accessing each link resulted in 404 Page Not Found errors.
Because I'm unable to view your photos, I don't know how you have decided that range has been lost. Remaining range is usually an estimate calculated with an undocumented algorithm making using remaining range unreliable, especially when comparing different i3's, drivers, driving conditions, etc.
Since we bought our 2014 BEV new in November, 2014, I've charged almost exclusively at 3.3 kW (16 A @ 208 V), typically to an indicated ~90%. Despite having driven less than 11k miles, actual range as well at Batt. Kapa. max have decreased ~20%, a very disappointing degradation rate that will probably not reach the 30% warranty limit by November, 2022, when our battery pack capacity warranty expires.
Some 60 Ah battery cells seem to be degrading much more rapidly than 94 Ah cells. Another explanation could be the battery management system gradually decreasing the usable capacity, maybe to reduce the actual degradation rate to minimize the number of warranty claims.
2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE