Don't underestimate the R7, it's better than you may think regarding the "better" cameras. I use it regularly alongside my R5, and I did have an R6 for a while. DxO PL brings out the best from the sensor in terms of minimising noise from its smaller size. My wife goes out bird shooting with me using the R7 and RF 100-400mm and I the R5 + RF 100-500mm, and her images are as good as mine. In the last week, I've been using the RF 200-800mm and her images at 400mm aren't that much worse than mine at 800mm for small, far off birds. It does have its limitations in terms of rolling shutter in ES mode but you get around those using EFCS or mechanical, and the AF may not be up to the R5, which is a beast, but it's still pretty good. So, don't regret your buy!
Here's an example from yesterday, we both took a quick snap at the same time of a Goldfinch 12m away, the R7 + 100-400mm vs R5 + RF 200-800mm at 800mm, at nearly 3x the weight and price (both centre crops).
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