2012 Prius struggling during first 10 minutes during high heat

First post, I am not nearly as knowledgeable as you all, so I’m hoping that you can give me some insight based on what I’m describing. Also, I’m not looking for a lot of DIY work, as I don’t have the skills or time to take that on. I’m trying to see if what I’m describing can be fixed by a mechanic and if it’s worth it.

2012 Prius, original owner, 213k miles. Mostly highway for the first 180 or so, then more city type driving since then. This summer, on really hot days (85 degreees F and higher), the car is really struggling for about the first 10 minutes of driving. The battery meter stays around 2 or 3 bars, and the engine is running the entire time. During acceleration, it seems like it’s getting zero help from the electric motor. The engine also seems like it’s staying at a high rev rate for a few more seconds when I take my foot off the gas. I keep the AC blasting, and I know that’s a big draw from the battery, but I’ve always done that on hot days. MPGs are around 32 during this time period, about 10 lower than normal during the less hot months.

The symptoms seem similar to what this person had, but my car is much older and has far more miles: 2013 Prius struggling in heat | PriusChat

Any ideas would be greatly appreciated!