What is this pipe near gutter?
I agree with Alaska man+
I had had flip houses we just dropped the new gutter downspouts next to the drain why would we do this?
it is common for these drains to fill with the gravel from shingles and leaves They almost have to be dug up to get them open once plugged,
Many years ago we tried jetting from the street discharge and from the house side thinking it was just leaves but the shingle gravel did not move and we almost got the jet head stuck , after that we just did not mess with them if they were plugged.
You may have luck working a hose in from both ends but my experience is a section will need to be dug up and cleared to get them to work again.