Meta Box

I wish I could utilized the function " /mb-frontend-submission/src/Post.php line 54-70" but I am new to this and a lot of knowledge to go about it hope one day.

I choose to modify the "submit" button via Css and works quite well.

Thank you for your time and great support that you have provided.

Great
I would like to style the submit button to a floating button, as you can see this is long form and some information might not be available at the time entry and there is no need to scroll to the end.
thank you

Thank you for you assistance.
I have manage to render the price in the same form by using this in the
shortcode: [mb_frontend_form id='product-price,product-information' post_fields='title,content,thumbnail']

it is working for the most part, but I dont know if this the correct way? Are you aware of a video or step by step. that directions to the matter
Confusing step: "Add post fields as normal custom fields to your meta box settings, like this:" I am not able to understand were to enter as normal custom fields in the meta box settings. I am using the oxygenbuilder in this matter if that makes any difference. But I can see if I learn the documentation method I will be able to pick and choose the desired fields.
The form in the builder preview renders properly "+ Add Media" , "Add New producer", "Add new country" etc
however in the regular view the "+ Add Media" renders like "Choose File" and all the: "Add New producer", "Add new country" etc they are not available. Please see attached images: https://imgur.com/a/IYdDcdH
here is the new page https://nmcellars.com/test/
if you know of instructional video how to do "mix post fields with custom fields" that will be helpful
Thank you for your time
John