This kind of thing drives me insane about ChromeOS.
Two different Pixel phones. Google made. Two different Chromebooks. Google OS. Doesn't work.
Phone to phone this 160mb file send in well under 30 seconds. How it should work. On the Chromebooks it took a restart to get it to find the machine at all. When it did the file crawled. 1% in 2 minutes.
This is on the most powerful chromebook out there the Acer 713. With a NVME SSD.
Since we know the bluetooth stack has been a mess since day 1 on ChromeOS I suspect that is what causes the issue here. But its a damn shame. Made worse by the fact that USB large file transfers aren't very fast either on ChromeOS.