Today I received https://aliexpress.ru/item/1005003380656890.html (color F) - small factor type-C trigger for notebooks. https://i.imgur.com/4e8pG5G.jpg
Since i ordered 3 of them (since I wasn't sure which size official barrel plug is) - now I'm sure it's 5.5x2.1. Here is photo:
And it's working just well for AMR5:
I have tested it under Cinebench on Max performance - QC chip was a slightly warm, but that's mostly because the fan outlet and power input is basically near each other.
AMR5 full-featured Type-c interface to link PD fast charging video
AMD Ryzen 5 5600U/4500U/5300U/5800U