Help to expose HA with fly.io

Configuration
1

Hi, I want to use cloud with fly.io, but I have error at first step.
My configuration is raspberry 4 with raspberry so 32 bit.
When I put curl command I have error : unable to find flyctl release For Linux/Armv7l/Latest

2

There is no sign of armf releases here: Releases · superfly/flyctl · GitHub

3

Nothing for Raspberry devices?

4

Install the 64bit OS.