Hello Gayan,
I am keeping well and safe too, Thank you for asking ☺.
I'm glad to know you can see improvements, could you please let me know what exactly are the improvements you feel (pain, flexibility, etc.)?
Since the exercises I asked you to perform were basic ones, the intention of those were to improve your basic knee muscles strength. We can work on further exercises depending on your current condition.
You take care too and keep well.
Kind Regards
Bellona 😊