Show chat player names Minecraft?

How can I show certain players in the chat without a plugin that doesn't require the names to be fixed?

What do you mean "show in chat"?

What do you mean "that the names don't have to be fixed"?

Who are "certain players", how is that determined?

Quasi that players who have a certain score are shown in a message in the chat

Execute as @a [scores = {scorename = 1.}] run say My score is one

This means that all players who have a score greater than 1 on scorename write "My score is one" in the chat. It couldn't be better, I think. You can't output all of them in one message; you have to output each one individually.

The "1." means "greater than or equal to 1". Of course you can also remove the points to check if who has EXACTLY 1. And / or swap the 1 with another number.