No such thing. More like reliable push-polls.
Like that absurd poll showing an upward trend in approval of Biden overall of all categories of voters. Nonsense.
What event, speech, photo op or policy triumph would have caused such a trend? Why would some who thought he was declining mentally suddenly say "but now I think he's getting sharper and smarter every day."
I admit saying "$4,000 per person government checks are going out to all next week" would cause a swing upward.