How to create text in the right part of the button in NativeUI

[secretic]

[NativeUI] Who can help me to create a text in button
Example on screenshot..!

Screenshot: https://ibb.co/k36Ltjz
or
[ Button1ᅠᅠᅠᅠᅠthis ᅠ0/5 ]

this is similar to the text that is in the inventory of the mod " Simple zombies"