I can only repeat: I am very sorry for your loss. If you can use your professional knowledge, your contacts and your love for animals to help other animals in need in your home country: do it! Start an international crowdfunding campaign! There are so many animal lovers... But please don't pray that you will soon be reunited with Arya. No one would benefit from that. Take your time with your grief - it is not the end.
I've been trying to do research on this. There's no proper regulatory body of animals in Pakistan but there are a few bug NGOs and I've been trying to get in touch with them.
There is a German ex pat in Pakistan... She is committed to animal welfare. May be you can talk to her about your ideas... I think she is a good networker.
https://www.tierheilpraxistrickcatting.com/tierschutz-in-pakistan