Despite the immediate kinetic conflict coming to an end, India has still suspended the Indus Water Treaty that risks cutting off Pakistan's critical water supply, and seems to have also increased its material support to terrorist groups; both religious and separatist in nature. This means it's very likely the two countries are going to have a military skirmish again soon. If it escalates further again, the risk of war is very real.
Some things I think Pakistan must focus on now following this skirmish:
1. Upgrade your air defence into a more layered, upgraded and networked system, as Indian missile strikes showed clear weaknesses and gaps. Ukraine did this somewhat well, albeit with NATO support.
2. Have a credible offensive arsenal of munitions/missiles. Hypersonic maneuverable warheads with decent range are necessary, as India possesses a capable layered IADS, including S-400.
3. Work on SEAD/DEAD mission effectiveness, assess how well you can perform this. Not sure how valid their strike capability is because the claims of S-400 neutralisation lack evidence. A large payload platform is missing.
4. Cheap but effective loitering munitions that can saturate Indian AD, go after low value targets. Pakistan could probably produce a local design similar to Iranian Shaheds.
5. Disperse aerial assets across the country, have multiple back-up runways, utilise motorway system.
6. Work on maintaining current aerial superiority, through smart inductions to maintain edge and superior training.
If anyone has other suggestions, feel free to share.