More problems.
I have the two-port 13inch 2020 MBP.
The power cord needs one port, and that leaves you with only one port for peripherals. So I got a Satechi hub from Apple at the same time I got the laptop. But although the hub had several ports, it would not let me plug in both my monitor and my LaCie backup; if I did, no signal would go to the monitor. I noticed the hub got hot and asked the people at Staples about this. They said that if the laptop was hot, that might be heating the hub as well - and the heat was what was keeping the hub from working. They suggested I try a J5 hub that snaps into the side of the laptop and therefore could sit on top of the cooling pad I have to put the laptop on top of.
The J5 hub is $120 CDN, so before I bought it I called Apple Support to ask if this would solve the problem. I told them about needing to have both my monitor and LaCie backup plugged in. I also asked them if they would give me a full refund and put it towards another MBP that could get around these problems. After being transferred from person to person, my call was disconnected. They didn't call me back.
So I got the J5 hub, and it gets even hotter than the Satechi did. If I forget to turn on the cooling pad fans, I lose power to my monitor. Even with the cooling pad fans going, the J5 hub still gets warm and will cause my monitor screen to start flickering, and then to intermittently go black (no signal).
To throw more good money after bad, I went out and got a new HDMI cable in case that would help, but it didn't.
When I call Apple, they ask how hot my laptop gets, and I can only tell them that it's hotter than body temperature by the feel of it. So I thought that perhaps if I could get a true thermal reading on it, that would help me put my case before them. So I bought a laser thermal reader - but the thing doesn't work. At least I can take that back and get a refund.
So in addition to the considerable cost of the laptop, I've also bought two hubs, a cooling pad, a wall USB plug to power the cooling pad, an HDMI cable, and a USB-C to USB-A adapter. And I still don't have a system that meets my needs.