Yes, the Samsung Galaxy A50 with model number S506DL supports 5GHz WiFi!
According to the WI-FI Alliance certifcation for the samsung Galaxy A50 S506DL smartphone,The Galaxy A50 is a dual band smartphone that support both 2.4 GHz and 5 GHz WiFi?
FYI, The difference between 2.4 GHz and 5 GHz really comes down to two factors: bandwidth (speed) and range!
The 2.4GHz band usually supports up to 450 Mbps or 600 Mbps, while the 5GHz band can bear up to 1300 Mbps!
Date of Last Certification: 2021-04-13
Brand: Samsung Electronics
Model Number: SM-S506DL
Product Model Variant: 2021-04-13
Category: Smartphone, multi-mode (Wi-Fi and other)
Operating System: Android, version:11.0; Android, version:11.0
Frequency Band(s): 2.4 GHz; 5 GHz