I have batch 4 WTT tokens due to be issued on 15th September.
I also have three L3+ due to be shipped in end-September, and one D3 in mid-October.
When can I expect them to be deployed for mining?

If you bought them directly from gigawatt.sg then they will inform you when they have been shipped, arrived and when they have been installed. With the release of WTT tokens delayed, if they are released before you hardware arrives then you can rent out your tokens until the miners are installed.