This is one example MacBook size MF cloth
This is the cable that I use with mine for what it's worth. My display is 1440p 165hz and I have had zero issues.
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https://www.amazon.com/j5create-Display-Thunderbolt-Compatible-JCA141/dp/B016ZZMV0U
How about something like this Anker? I use anker products a ton and love them. It’s cheaper and smaller than the belkin.
I use this VanMass from Amazon on my M1 Mini. https://www.amazon.com/gp/product/B07HFQL2PB/
It runs my second monitor from the HDMI port with no issues.
There are some ultrawide support issues that I've seen mentioned for the M1s, but I don't recall the details.
I haven’t had any issues with an external display. Although I am using CalDigit TS3 Plus Thunderbolt 3 Dock - 87W Charging, 7X USB 3.1 Ports, USB-C Gen 2, DisplayPort, UHS-II SD Card Slot, Gigabit Ethernet for Mac & PC
I hear that the M1 has trouble with some cheap-o USB-C docks.
It gets hot, but it does the job nicely, small enough to toss in my backpack too.
I own two of these I had bought over the years for my Xbox One - https://www.amazon.com/SanDisk-1TB-Extreme-Portable-SDSSDE81-1T00-G25/dp/B08GV9M64L/ref=sr_1_2?dchild=1&keywords=sandisk+ssd&qid=1615742491&sr=8-2
They are nice n rugged and can recommend them if you need extra hard drive space! I keep one in my backpack at all times.
I have two.
https://www.belkin.com/us/p/P-INC004/
The one on Amazon is great bc it’s designed to be flipped over depending on where your usb-c connections are.
The Belkin one is good. I keep it in my laptop bag for when I travel.