I have used POGO connectors before, but dislike them now very much. To flimsy, unstable and bad connections. Constantly poping of the PCB.
And we were buying the original, expensive ones from Tag-Connect.
Now we use the clamps, like in the attached picture. Get them from AliExpress, can also buy spare replacement pins.
They come in many configurations, 1.27 mm, 2.00 mm, and 2.54 mm ...
They are dirt cheap and so far have been lasting for years without any issues. We use them for both,
UART and programming ...
Cheers,
rudi