I’ve just recently started using the extended bolus feature of the Tandem pump. It works well for high fat meals or for other foods with low glycemic indexes that raise your blood sugar over time. I am doing it on the repeated suggestions of my endo and it really does work well - bringing down those long period highs after high fat meals.
Like @eric, I don’t count carbs any more, but I do guestimate based on what I’m eating. we get pretty quick feedback with CGMs.
Oh, and welcome @MissKent . Stick around - i’d certainly appreciate your experience with the condition.