What is the usecase of this? I get it.. they're tiny, but why? They're too small to handle properly (how do you pull it out if you have fat fingers?), they're too small to properly solder on wires to connect whatever else, and when there are 4 wires soldered on, they're not tiny anymore,... The only way I'd use them is for some kind of "hacking" situation, when an emulated keyboard is needed, and one of these can be installed and stay hidden in someone elses computer.

Otherwise, i'd use something like this (not afiliated):

https://www.aliexpress.com/item/1005003668483454.html

Enough pins are accessible, led is visible, headers can be soldered on and development can be done with dupont wires, the led is visible, and they're not that large still.

If you need more (and wifi), you even have stuff like this: https://www.aliexpress.com/item/1005004860003638.html (again, not afiliated)