How can I increase max file size to allow large image attachments on web form?

How can I increase so large of the images attached in the form?

I could see that the maximum
I could see that the maximum image size is 1024KB and average images that I recivo is 2MB to 3mb

The individual max file size can be increased up to 1GB. Please take a look at the following guide.

Changing the upload size limit

If you need any further assistance, please let us know.