I must've missed where migrants are being fast tracked to citizenship because that typically takes close to a year, has multiple steps and requirements, and takes money to get someone through the process. You typically have to have lived in the US as a permanent resident for 5 years or be married to a citizen for 3. It is not so simple as just dropping someone into a swing state and boom they're a citizen. They have to apply, they have to be fingerprinted, they have to be interviewed, they have to take a citizenship test, and they have to be present at an oath ceremony. The government does nothing quickly. In my line of work, I help people get a government certification that can take 4 to 6 weeks for anyone born outside of the US because their documents have to undergo a screening process before their application even gets looked at.
https://www.uscis.gov/sites/default/files/document/brochures/M-1051.pdf
Non-citizens cannot vote. There is no mechanism outside of fraud that allows them to vote. If the Federal Government was fast tracking migrants to become citizens, it would be blasted everywhere. This is just the typical Musk replacement theory hysteria.