Vast majority of BMP-2s are not upgraded. Unlike with the T-72B3 or T-80BVM upgrades, where we have access to OFFICIAL CONTRACTs claiming hundreds of tanks, we only have 1 or 2 BMP-2Mofficial upgrade contracts of less than 20 vehicles each. The unupgraded BMP-2, unlike the M2A2 ODS, lacks any thermal vision device or BMS. Nothing, nada, zilch. Just a shitty 1970s NVD and IR searchlight. The BMP-2M corrects this, with an excellent domestis thermal imager superior to all bradley thermals, but as I said earlier, BMP-2 havent been massively upgraded like russian tanks and have only started to be upgraded very recently, only since 2018, unlike with the T-72B.
Additionally, the M2A2 ODS has additional applique armor that protects against 12.7, 14.5mm and maybe 30mm full bore AP-T from 1500km+. The BMP-2, even with the BMP-2D applique armor, only has 40mm equivalent RHA from the front and 15-25mm RHA from the sides. The 25mm APFSDS penetrates around 50mm from 1500m. BMP-2s almost never use 30mm APDS rounds.
Im confident that the M2A2 ODS will be easily destroyed in the ukraine by AT assets and that its inferior to the BMP-2M and BMP-3 in most metrics, but stop retending like its inferior to the BMP-2 model 1980, BMP-2D, or BMP-2 model 1986.