I lost 98lb in 6months.

I've been on the Keto diet for almost a year. I lost 98lb in 6months. But for the last 4 months, I have stalled. I've switched up my IF patterns ...lowered calories... upped calories... lowered fat...upped fat. I don't snack. I'm dairy-free. I've changed up my meals. Currently trialling lower protein to see If it helps. I'm out of ideas...