How to create / add / remove column names in Google Spreadsheet?

How to create / add / remove column names in Google Sheet?
You need to do the process according to the following scheme:

  1. According to one of the scripts, a copy was created from the Google Spreadsheet file (either empty - there are no column names, or there is a preset of several column names).
  2. How to create additional columns with names in the new table?
  3. Is it possible to create new sheets in this new table?
    Is there any way to do this with n8n?

That is currently sadly not possible. You can however create a feature request for the columns and people can then upvote.

About creating a new sheet. There is already a feature request:

Jan, thank you very much for your answer.
How stable will the schema be if you create a table template in which the column names are numbers (1,2,3,4,5 …), these numbers will be the basis for adding variable column names in the second line?
Then copy this table and, as the first action, add the names of new columns to the second row and then work with queries in this table starting from the third row with the required data.