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If it is, indeed, Leaf Curl Virus then it will likely not produce anything. You will need to destroy the plant and you will likely have a problem growing any member from the Cucurbitacea family in that spot.

If you have a fruit that is recognizable as a fruit still, then it may be another problem that is treatable. I cannot confirm without a picture, but there are many treatable issues that can resemble virus damage, which is not treatable.

Here are some articles that will help:

https://www.gardeningknowhow.com/edible/vegetables/pumpkin/diseases-of-pumpkins.htm

https://www.gardeningknowhow.com/edible/vegetables/pumpkin/wilting-pumpkin-plants.htm

https://www.gardeningknowhow.com/edible/fruits/watermelon/squash-leaf-curl-on-watermelons.htm

Pumpkins need lots of water! 2 to 4 inches a week. Keep track of the rainfall so you know how much to supplement.

These articles should help:

https://www.gardeningknowhow.com/edible/vegetables/pumpkin/pumpkin-growing-tips-for-halloween-pumpkins.htm

https://web.extension.illinois.edu/pumpkins/growing.cfm

It looks like they are being overwatered. Make sure to allow the soil to dry, very thoroughly, down to at least 2 or 3 inches between watering. Likely, this will not be every day. In fact, it will not be on schedule, at all!

You can check with your finger, or more accurately, with a moisture meter.

Likely, you will want to treat with a fungicide, as well as correct watering habits.

Here are some articles that will help:

https://www.gardeningknowhow.com/garden-how-to/watering/watering-garden.htm

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

This is likely a fungal infection. Make sure that you are watering as the soil needs it, rather then on schedule. The soil needs to be able to dry COMPLETELY down to about 2 or 3 inches between watering. This will kill off any infections within the top layer of the soil.

Only cut them off if they are spreading to more than half of the leaf, as opening a wound will allow the disease to spread faster. You will need a fungicide to treat the plant:

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

This article will help you to use a soil moisture meter:

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm

https://www.gardeningknowhow.com/edible/vegetables/pumpkin/pumpkin-growing-tips-for-halloween-pumpkins.htm

Unfortunately, your photo did not come through. Likely, it has contracted a fungal/bacterial infection from the damage.

You may need fungicides. This article will help:

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

Pumpkins will rarely produce fruit when grown in container. Their container requirement is quite large. 15 to 20 gallons of soil will be required, and heavy trellising will be necessary as well.

Here is an article that will help you to grow pumpkins:

https://www.gardeningknowhow.com/edible/vegetables/pumpkin/pumpkin-growing.htm

They look like scale insect pests. Here is more information and how to control them:

https://www.gardeningknowhow.com/plant-problems/pests/insects/control-plant-scale.htm