The Philips 55PFL6900 supports a newer WiFi standard than most TVs of this spec and age. This Philips TV supports an 802.11n WiFi standard, whereas most 4K and 8K TVs that have been on the market for a similar time to it support an 802.11a WiFi standard. In addition, this television support 802.11ac and 802.11b and 802.11g WiFi standards.
This TV's WiFi standard (802.11n) is actually the best supported WiFi standard across all TVs of a comparable spec and age to the 55PFL6900.
Across comparable types of TV the worst supported WiFi standard is 802.11a.