How can i hide the attribute’s name?

Try the below code at Appearance > Customize > Additional CSS

table.variations th.label.cell {
    display: none;
}

Then let me know if it resolves your issue or not.

Unfortunately, the code is not working :/ The label is still there.

The styling is coming from the WoodMart theme. The code should work. I have tested and got this result.

BTW, please try the below CSS at Appearance > Customize > Additional CSS or,

at WoodMart theme options > Additional CSS

table.variations .label {
    display: none;
}

If the above code doesn’t work. Please replace that with-

table.variations .label {
    display: none !important;
}

Then let me know if it works.

I tried both, and none of them worked :/ I had no idea what is the problem.

After adding the above code, did you clear your cache?

Clear all caches like browser + caching plugin (if you have any) + server-side cache (if your site is hosted at wpengine)

Then check whether it is working or not.

Yes, i cleared all of it, and still nothing happens :/

In that case, it is difficult to give a solution without entering your site panel.

BTW, it is working on inspecting mode; so it should work.