2 Gbps service, still only able to pull 400-500 Mbps on Wi-Fi right next to router.

Upgraded from 1200 Mbps to 2000 Mbps and my speed tests before and after virtually the same.  In fact I have barely been able to replicated the numbers I was able to get before.  I tried resetting everything and still the same.  I'm not sure what I should expect on WiFi since I know it will be a bit slower than connected directly with an ethernet cable.  Here's what I've done so far to give a better view of what I'm looking at. 

My PC is about 25ft away from my router, which is in my garage (finished) and my router in my living room, so yes it has to go through walls.  I have the Arris TG4482A and my PC has a Killer Wi-Fi 6 AX1650i 160MHz that has a max speed of 2.4 Gbps.  The best download speed it can muster is about 140 Mbps.  When I test with my phone, in the same location (again 25 feet away and through walls) I get about the same speed as my PC.  When I move my phone (i phone 12) right next to the router I can see somewhere in the 400-500 Mbps range, so I assume my PC would do about the same at point blank.  I have not tested connected directly with an ethernet cable.

Now mind you these speeds are virtually identical to what I was getting with 1200 Mbps service.  I wasn't expecting a massive increase in speed, but I expected to notice SOMETHING.  How do I verify I'm getting what I pay for?  Should I get a CAT-6 cable and hook it up directly?  Any advice would be appreciated as I'm very limited on knowledge on this topic.

Does this sound right?