The power input or output is the same across either side.
You still get three USB-C ports with Thunderbolt 4 support, but Apple has added a MagSafe 3 port for charging. Both the 14 and 16-inch models come with three Thunderbolt 4 ports, an HDMI port, SDXC card reader, a 3.5mm headphone jack, and MagSafe charging. After the USB-C-only days of earlier MacBook Pros, the 2021 model was a huge breath of fresh air.
The late 2018 & 2019 models use a different PCH so it makes sense they are OK!
Yes, its true! The left side ports data rate is different than the right on the 13ā models only, The 15ā models appear to be the same! Iām not sure what is different within the PCH between these to explain this as both use the same PCH.