Just an anecdote from me.
I made a career switch that I did not want to make in 2001. I was "doing what I loved" but did not love the company, company was bought and it got worse.
Layoffs ensued.
After 911, no was hiring and I was out of work, severance gone, and it was tough. I saw an ad one day and read through it several time - just so shocked I could apply for anything, things were so scarce. I got the job too, and it was an industry change I did not want, but - ya - food, ya know?
I progressed and did well, but never really "got into it" - After both I and the economy stabilized, I made a few attempts to go back - interviews, headhunters, etc.
Surprisingly! I found myself getting depressed during the interviews, felt like it was a big step back. I was also able to specialize within my new industry in something that was a bit adjacent to the old one and I really tried to focus/specialize in that. But after conquering that piece - that isn't the part I like best!
After about a decade, I had grown to love the new industry - I found my place in it so to speak. It had seemed so much routine and not creative - but it is actually more so than the old industry. It just took about 10 years for me to gain the knowledge base and insight over 3 different companies and to build my personal brand and prestige within the industry to feel as on top of it all and as creative as I was in the old one.
So - that's me!
Why did you go into engineering? What did you hope to do/accomplish?
What other companies are a possibility for you? How would those companies perhaps be a better fit for what you most enjoy?
You do have a great base of savings, but given your great position, think also about sticking it out until 30 and massively save. You would indeed be set and could pursue more passion project type jobs, while also giving engineering more of a chance to shine for you.