What are some good Isekai with mechas?

I am halfway done with Aura Battler Dunbine as I know the show came out so long ago, but I am kind of sad because I will eventually be done with the show as I am enjoying the hectic nature of the anime.

Sure it’s cynical as heck, but that’s what draws me into the show as it’s interesting to see how wild it gets as sometimes I wonder if an anime series like it exists in modern times with a premise that goes from calm to hectic fast.

To put it simply, I have been following some of Tomino’s works such as Ideon and Zambot that I wonder why dark mecha series are rare in modern anime as I have found an interest for such works.