Samsung
Rename a Folder on the Home Screen auf Samsung
When you group apps into a folder on a Samsung Home screen, One UI does not assign a name automatically. The folder simply displays the icons inside it, which works fine for two or three apps but becomes confusing once a folder holds more.
The naming field sits directly on the folder itself, not in a separate settings menu. This keeps the process quick, but it is easy to miss if you expect a long options list.
To add or change a folder name, tap on the folder to open it. Then tap on the folder name field at the top, even if it currently shows no text. Enter the name you want and confirm with Done.
Menu path
Tap on a Folder ➔ Tap on the Folder name ➔ Enter a Name and tap Done
This works the same for folders you just created and for older folders that already contain apps. If you only want to reorganize which apps sit in a folder rather than rename it, moving icons in and out is a separate action and does not require touching the name field.