In 2019, a poll was run calling for the Government to "revoke Article 50 and remain in the EU". That vote got more than 6 million votes.
"The government repeatedly claims exiting the EU is 'the will of the people'. We need to put a stop to this claim by proving the strength of public support now, for remaining in the EU. A People's Vote may not happen - so vote now", it said.
In response, the Government said: "This Government will not revoke Article 50. We will honour the result of the 2016 referendum and work with Parliament to deliver a deal that ensures we leave the European Union."
https://www.express.co.uk/latest/brexit
If a petition signed by more than 6 million fell flat, why would anyone think this petition will be any different?