Kumquat Tree HELP

Question

So I’ve still been spraying it with neem oil because it seems to have a pest, however it’s still dropping leaves. Any help?

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Answer 1

It is difficult to get a close look at the stems but I do believe I see Scale pests on the plant.
Remove all the dropped and dead leaves and discard them.
Treat with Neem Oil; every 3 days for 2 weeks.

https://www.gardeningknowhow.com/edible/fruits/citrus/controlling-citrus-scale.htm
Keep the soil moist but not soggy. Make sure the container has a good drainage hole.
Your plant is quite stressed, if you can get the scale under control it may survive.