@guyinazo yes a Forms form can be public-facing, just change the settings on the form to Anyone can respond. That will make the form completely anonymous, so if you later think you might want to respond to people who completed it then you'll need questions for their name and email adress.
It is always best practice to use a flow in Power Automate to automatically grab each response as it comes in and save it to a list in SharePoint or to a separate excel file. This gets over so many of the issues reported here on the forum (both those caused by Forms and form owner mistakes). A very simple example of such a flow is below:
You can then either have follow-on actions, for example we generally do personalised emails back to the submitter which is one of the reasons for the Office 365 Users get user profile (v2) action. Or you could have another flow that gets triggered when the new item in the list is created.
If your form submitters are external then you don't really need or would want to create a Power App as there woulod be quite high additional licencing costs to pay for Power Apps Portal..
Rob
Los Gallardos
Intranet, SharePoint and Power Platform Manager (and classic 1967 Morris Traveller driver)