No.
A bill has been introduced to do just that. However, most bills go nowhere and never even get voted on, so slot players should not get their hopes up.
Personally, if I had a vote in the matter I would vote YES enthusiastically. The current $1,200 limit has not been increased since 1977. According to the American Institute or Economic Research, $1,200 in 1977 would have been worth $5,336 in 2021. I could easily make an argument against all taxation of gambling winnings. However, I know that ship won't float, so the least we can do is recalibrate the minimum taxable jackpot to inflation, which should have been done all along.
For more information, please read Bill would raise slot jackpot tax report threshold to $5,000 at the Las Vegas Sun.