Saying the democrats were lying and he didn't know what Prohect 2025 was still important to his election. I literally saw people, when P25 was brought up say 'yeah it's awful, but he said he didn't know what it was so it won't happen'. But we may have differing considerations for what constitutes a campaign. I'd argue, as he denied connections to it, he did campaign that he wasn't going to follow Project 2025.
Regarding immigration, yes he said he was going to round up people with no legal immigration status who were criminals. He quoted an impossible number of them. They've mostly been arresting people at their status hearings with immigration courts who don't have a criminal record while also trampling the constitutional rights of US citizens and arguably the non-legal status immigrants.
So I'd argue still a lie.