When a new member starts, I find it good to provide some 3rd party training material so we can ensure we’re all at the same level. Udemy provides a great cost effective source for video led materials.I use this in addition to our own LMS materials (confidential!) to ensure there’ s a common business understanding.
Here’s a link to some of the videos I use;
Front end developers
Architects (who are upskilling from developer role)
These don’t replace on the job training, they just provide a base-line and something we can refer back to. I use linked-in learning and pluralsight too, but can’t give away all my reference material!