Lines in cascade combo box

hello! have a problem with the number of items shown in a drop down list when testing the questionnaire. I upload an excel file in a category with 250 lines, and then when I tested the questionnaire, it only shows 50 or so items in the list. Even though i can type the name of the item and then select the corresponding one, I would like to know why it does not show all the lines that appear in the uploaded list.

for the same reason that Google shows you only 8 suggestions when you type something, not all websites in the world:

You are probably trying to use a combobox instead of dropdown, which it is not.

It’s not like you may, you must type.

Thank you very much for your answer. I will try to modify it.