Hi Diana,
I hope this email finds you well. Thank you for reaching out to us.
Regarding your first question, Unfortunately the Make a Price Offer for WooCommerce plugin is currently not compatible with the Dokan plugin.
For your second question, you can set the minimum and maximum order value by following these steps:
1. Go to WooCommerce -> Settings -> Price Offers -> Form
2. In this section, you can set your Minimal price and Maximal price.
I hope this information was helpful to you. Please don’t hesitate to reach out if you have any further questions or need additional assistance.
Best regards,