Here You can check the Frequency Bands and Network Compatibility of Samsung Galaxy S20+ 5G with model number SM-G986U1 and SM-G986XU!
According to the FCC documents, The Galaxy S20 Plus 5G (FCC ID: A3LSMG986U) supports 2 GSM bands, 3 UMTS bands, 10 LTE bands, and 5 5G NR frequency bands, See the tables below for details.
GSM/GPRS/EDGE 850
GSM/GPRS/EDGE 1900
UMTS 850
UMTS 1750
UMTS 1900
LTE Band 71
LTE Band 12
LTE Band 13
LTE Band 14
LTE Band 26 (cell)
LTE Band 5 (cell)
LTE Band 66 (AWS)
LTE Band 4 (AWS)
LTE Band 25 (PCS)
LTE Band2 (PCS)
LTE Band 30
LTE Band 7
LTE Band 48
LTE Band 41
LTE Band 38
NR Band n71
NR Band n5 (Cell)
NR Band n66 (AWS)
NR Band n2 (pcs)
NR Band n41
Visit https://en.wikipedia.org/wiki/List_of_5G_NR_networks to find out the List of 5G NR networks