It's a lot like how the console -> handheld transition went, but with a few more restrictions.
When Japanese console games started moving toward handhelds, they had to take in a lot of considerations like more limited hardware power, smaller cartridge sizes, shorter play sessions, save anywhere, and a more limited control scheme. However, as time went on, the complexity in handheld games started going back up as progressively more of the console audience showed up on handhelds, while still making sure to keep these ideas in mind. These trends continued as the platforms got more powerful, designers got more used to making handheld games, and developers were willing to break some of the previously established rules due to evolving audience taste.
Traditional mobile logic stated you should have as short of a story as possible because players wanted to get into a game and start playing immediately. However, Fate/Grand Order is the #2 highest grossing game in Japan, and the game starts off with 24 minute cutscene with a 2 minute battle sequence shoved in. Many of the immediately following missions have a similar ratio of storyline to gameplay, and the plotline has over 1 million words. You will notice that the 20-25 minute mission length here is also pretty long for a mobile title. There are some shorter battle things you can do however if you have less time. You can see a video of this here:
https://www.youtube.com/watch?v=khn5TjnKVEI
Similarly, The Idolmaster is a straight up rhythm game with console quality graphics:
https://www.youtube.com/watch?v=ZIXWYeRcxBw
Here is a video of Tales of the Rays. The actual battle system works a lot like a regular Tales game (you walk around levels and pick up loot, watch lengthy cutscenes, and the battle system is similar to the actual console games with the ability to walk around in battle, the four artes mapped to swiping in one of four direction, the basic attack is mapped to tapping the screen, and the supers to swiping up on the character portraits, and you can also switch party members mid battle). To note, the first 5 minutes and 20 seconds here are a regular Tales cutscene (which is a mix of portrait discussions and some in-game cutscenes), and then the gameplay starts:
https://youtu.be/f8oXJVwBQu8 (After that first mission the video just focuses on the boss fights and cutscenes).
Moving to the game I referred to as Final Fantasy XII-lite, here is a video of Lost Order. You will notice it features lengthy, fully voiced cutscenes (you will notice the player is trying to skip through the voice acting for the sake for the video) presented similarly to a handheld title, and then a battle system where you design gambits for your party while using their special moves. Mind, this game doesn't have explorable levels or towns like are becoming more common in mobile. To note, there are battles with a lot more party members and enemies later in the video:
https://www.youtube.com/watch?v=HhBAi_TTDo0
