Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
When using the KPI visualization:

and set one of the thresholds to be + Infinite:

When loading the dossier via the Library App on IOS the changes won’t be applied but loading it via the android the thresholds will be applied accordingly:

The Strategy team is aware of this issue and is working on fixing this issue in a future release.
Instead of using KPI alternatively implement “Multi Metric KPI" as this behavior is not present in this specific, in case of requiring the implementation of +infinite thresholds this is a recommendable option.

Workaround 2
Instead of setting the maximum value of the threshold to +infinite, to alternatively set a value that has a defined limit (e.g. 999999).
