Yes. The IRMAA thresholds for 2025 were determined in October 2024. The latest information available as to your MAGI, which is what determines whether will be over the threshold is the information in the tax return you filed this past April (i.e. - your 2023 income). It will be the same process next year and the year after that - it is always the MAGI from two years prior that determines if you must pay IRMAA. It can be no other way.
In my opinion, too many people make a mountain out of a molehill about this two year lag. I have known for almost two months what the 2025 IRMAA levels will be. Since we very rarely have deflation in this country, I can assume that the 2026 levels will be higher after they are inflation adjusted. So if I take steps to control my MAGI this year (2024) and keep it under the 2025 levels, I will almost certainly be under the 2026 levels when they are finalized next October. Will I leave a few thousand dollars of potential Roth conversion unused? Yes, but missing the threshold by a little under beats taking the chance of going over. In the grand scheme of things, it's peanuts.
As the years progress, NIIT will affect more and more people, but it will only increase their taxes, it won't do anything to the IRMAA brackets.