Data validation and comparison of text values in a form with a list of data from a table

Hello. I have been spending a lot of time solving the problem, I need to compare a text value with a list of text values from the table when filling out the form. Since this is a form, the formula should give a true or false value

I would be very grateful if you could tell me in which direction to move. I think it’s worth digging in the direction of filter() and comparing with the value from the form.

Not enough info. Can you give a more detailed description?