Is there any idea whether VMware is coming up any solution or tool for this ?
Looks like you have a lot of questions around VMC, you should probably contact your dedicated VMware sales team to get in touch with a specialist.
Going back to your question, we do not have an official tool within VMC to import on premises NSX-T rules.
Do you have hundreds or thousand defined rules? If it's just a question of dozens, could be more efficient to do it manually and take the opportunity to clean it.
But you have some "unofficial" ways to export/import rules as per these websites :
- Wiliam Lam blog: https://www.virtuallyghetto.com/2019/01/managing-distributed-firewall-rules-in-vmc-using-powershell-nsx-t-policy-api.htmlhttps://www.virtuallyghetto.com/2019/01/managing-distributed-firewall-rules-in-vmc-using-powershell-nsx-t-policy-api.htm…
Hope that helps and don't forget to set my answer as useful.