Enabling this Elementor Pro Form Extension you can find a new "Actions After Submit" called Dynamic Redirect.
Add it to "Add Action" multi-select and the new Dynamic Redirect Section will appear.
Set Your Conditions
You can set multiple conditions, click on "Add Item" to set a new redirect option.
Pay attention to the order, when a condition is satisfied the next redirect options will be ignored.
Redirect Options
Condition: type the field ID
Condition Status: the logic operation used on the selected field.
Empty, if the current field has not a value;
Valued, if the current field is filled or selected by the user;
Less Than, the field's value has a value less than... (usually for number or dates);
Greater Than, the field's value has a value great than... (usually for number or dates);
Equal To, the field's value is exactly equal to...;
Contain, the field's value contains a substring.
Condition Value: the comparative value, needed only for a certain operation.
Redirect To: the URL to redirect the user after submission if the condition is satisfied.
In the Url field you can use Elementor Field shortcodes (like [field id="email"]) and also Tokens (like [form:email]).
Example:
https://www.mysite.ext/?email=[field id="email"]&name=[form:name|strtolower|str_replace(' ','_')]
NOTE: it's important to use the urlencode filter on all fields which could contain special chars, like [form:name|urlencode]