My wifi connection on my iphone 7 plus and someone elses iphone X pins itself at 50Mbps anywhere in the house even though we pay for what used to be 200Mbps max but is now advertiesed as 150Mbps average, i tested the 'wifi sweetspot' app and that gets upto 300Mbps. We have 2 black wifi discs both with their lights blue. My ethernet speed on my pc is fine at around 150Mbps.
We do have philips hue lightbulbs along with nest thermostat and smoke alarms as well as multiple smart assistants like sonos one and amazon echo. There are approximatley28 different devices on wifi, is this too many or may there be a real problem with the wifi.