Question about successful VPS tracking in indoor environments

[arenas7307979]

I have found that the issue causing VPS convergence lies in the error thresholds of the native GNSS.

self->kHorizontalAccuracyLowThreshold = 5;
self->kHorizontalAccuracyHighThreshold = 10;
self->kHeadingAccuracyLowThreshold = 5;
self->kHeadingAccuracyHighThreshold = 20;

However, in indoor or open outdoor environments, although the error thresholds of native GNSS are low, the uncertainty of whether VPS is being used can lead to inaccurate latitudes, longitudes, and heights. Indoor environments, in particular, are prone to a lot of misjudgments. Are there any other methods or parameters available to verify successful VPS convergence?