Engine-assisted training is interesting.
The advantages of using an engine for analysis is well known, whilest for study it's limited.

One of the reasons I can think of is that for training openings and tabias vs an engine combines brilliantly after having studied an opening in a table base or perhaps a real book.
Also, for training end games an engine is perfect to test your skills that you've learnt in a book or perhaps via a table base as well.

But when it comes to the middle game... Tactics, strategy etc. will be hard to train with an engine.
I tried it in the past and it gave a false sense of 'I mastered it'. Because, you can always 'take back' a move, making it a non-game (which is fine, because its study anyway). At the end of a series of such trials and errors you've gotten yourself a nice game.
But how did you end up there? What was the plan? It's hard for an engine to explain WHY he did a move. Playing with/against an engine won't provide you any middle game insight. A book will.
In a middle game book you'll start in an interesting position and continue from there. You could always create a study (in Lichess) with those positions and variations of that and try to find the best move and play it against an engine.

Generally I would say: learn a book or video and train that knowledge against an engine.
Engines are surely a useful resource. But not your ONLY resource.

PS. This is of course my personal opinion and not 'The Truth'.

Engine-assisted training is interesting.
The advantages of using an engine for analysis is well known, whilest for study it's limited.

One of the reasons I can think of, is that for training openings and tabias an engine combines brilliantly after having studied an opening in a table base or perhaps a real book.
Also, for training end games an engine is perfect to test your skills that you've learnt in a book or perhaps via a table base as well.

But when it comes to the middle game... Tactics, strategy etc. will be hard to train with an engine.
I tried it in the past and it gave a false sense of 'I mastered it'. Because, you can always 'take back' a move, making it a non-game (which is fine, because it's study anyway). At the end of a series of such trials and errors you've gotten yourself a nice game.
But how did you end up there? What was the plan? It's hard for an engine to explain WHY he did a move. Playing with/against an engine won't provide you any middle game insight. A book will.
In a middle game book you'll start in an interesting position and continue from there. You could always create a study (in Lichess) with those positions and variations of that and try to find the best move and play it against an engine.

Generally I would say: learn a book or video and train that knowledge against an engine.
Engines are surely a useful resource. But not your ONLY resource.

PS. This is of course my personal opinion and not 'The Truth'.