Had covid 2 1/2 years ago with severe shortness of breath for months m.
could only walk 3-4 feet before I was out of breath.
Pulmonologist prescribed
Albuterol inhaler, initially 2 puffs every 4 -6 hours, then as needed.
and
Advair Inhaler (fluticasone & salmeterol- (for lung inflammation)

And I went to PT who was familiar w covid)m-
Worked on techniques to strengthen diaphragm, core, and rib muscles,
And exercises for vagus nerve .

4 weeks- able to walk dog again-1–2 blocks, - using techniques I learned.

Breathing stable for 2 years.