Sometimes, a journal article will mention or include the measurement tool that they used for their research, you can find these by searching the databases. Use terms such as Measure, Score, Scale, Survey, Tool, etc. to identify articles that mention a research instrument.
Sometimes you can find an article such as this one that uses a measurement tool that may be helpful to you.
Now that you know the name of this scale (Brief Accessibility, Responsiveness, and Engagement Scale) you can search for that name to try and find a copy.
You may have trouble getting an actual copy of your scale for free since many of these are expensive to develop. Sometimes the best method is to email the author of the article and ask if they would be willing to send you a copy.