Question BLE MTU Size and Connection Interval

[Anviori]

Hello,

1. Is there any way for me to determine what BLE MTU size different Android OS versions request? Does that depend on the phone model at all, or is it safe to assume the maximum allowed by the spec is always requested?
2. Similarly, how can I determine the same for any Connection interval limits (if any)?
   1. I've been seeing issues where older Android OS versions (Android 10 on a Nexus 7.1 in this case) has a lot of failures depending on the established Connection Interval. For example, at 500ms, it fails to do anything after a connection is established 50% of the time. OS v14 never fails this way.
3. iOS has this guide for the different BLE parameters, I was wondering if anything similar exists for Android OS?

Thank you