The Sharp LC-70UH30 supports a newer WiFi standard than most televisions of a comparable spec and age to it. This TV supports an 802.11n WiFi standard, whereas most 4K and 8K TVs that came out around the same time as it support an 802.11a WiFi standard. This Sharp television also support 802.11ac and 802.11b and 802.11g WiFi standards.
An 802.11n WiFi standard is in fact the best supported WiFi standard across all televisions that were released around the same time as the LC-70UH30.
An 802.11a WiFi standard is the worst supported WiFi standard amongst comparable types of TV.