I would try turning off the power to the boosters and see if you can get a wifi signal and internet access from the adsl modem.
If you turn wifi off on your phone you should have internet access, but you will be using data from your mobile data plan.
Up arrow means it's sending. Down arrow means it's receiving. If you don't see the down arrow that means there are no responses to the requests, i.e. no Internet.
You mention both WiFi and Data. Are you having this issue when connected to just WiFi, just mobile data or both?
If you able to access the internet when using a free WiFi Hotspot then it very likely the problem is with your home wifi network.
Do you have any computers connected to the router?
Do you have telus TV?
When you switched did you bring the S20 over from another carrier or did you get the device with TELUS?
If it was a device the was previously on another carrier and your mobile data is not working may have to change the APN settings in your phone. The TELUS guide for setting up for the TELUS APN can be found here: https://www.telus.com/en/bc/support/article/activate-data-on-your-android-device it would be the same for the Samsung Tablet if it is cellular enabled and attached to a Peace of Mind Connect or Simple Share plan.
If the device was purchased from TELUS then it should already have the correct APN settings and I’d call in to try and troubleshoot the mobile side and if still isn’t connecting to LTE or 5G may just have a faulty device that would need to go in for repair.