In APA 7th Edition, you can use a stable URL for the article. If it is too long, you can use a link shortener to create a friendly URL for it. You do not put "Retrieved from" in front of the URL for APA 7th. For example:
In APA 6th Edition, if you can’t find the DOI use the URL of the home page of the journal instead. You may have to Google the journal to find the URL of the journal website. Include the words 'Retrieved from' before the URL. For example:
We acknowledge the Australian Aboriginal and Torres Strait Islander peoples as the first inhabitants of the nation and acknowledge Traditional Owners of the lands where our staff and students, live, learn and work.