It doesn’t for me? I run it on Graphene without google play services. You just have to turn off battery optimization, but it’s very reasonable in its battery usage. I’ve been off battery for 18 hours, and am at 81% on my Pixel 8. Signal is at less than 1% of battery use, and it still will be in a few days when I’m ready to charge, unless I use it significantly on my phone. But I mostly use it from my laptop, and just get notifications on my phone, so probably not.

In contrast, K9 Mail is at around 3%, it’s running at battery optimized, and I haven’t opened it at all.