Was going to comment something similar. After 4 years at a job I loved, went through the worst burnout of my life in 2018-2019, roughly the year before the pandemic. Lost the job and about lost my mind when executive dysfunction made it so hard to find work. Spent 2020 doing handyman work and donating plasma to make rent.
Turns out that I was sensitive to wheat, milk/unaged cheese and almonds but didn't know it yet. That saps serotonin, which made it feel like the world was continuously attacking me. Which feels like the withdrawal symptoms of untreated ADHD, like quitting smoking constantly. But at the time, I thought I had something like CFS or fibromyalgia. I believe that these may be correlated with inflammatory foods, and that I might have eventually developed a chronic condition like hypothyroidism or even cancer, so it's worth taking a food sensitivity test. I took the https://www.everlywell.com (no affiliation) test of 200 foods and credit it with pretty much saving my life. Or at the very least, my psyche.
I think what helped me mentally recover during the pandemic was TikTok and the shared awakening that so many people have been experiencing. Love/hate for that app is probably going to correlate with how feeling/thinking, intuitive/sensing and perceiving/judging someone's brain works though (I'm an INFP) so YMMV. I find that shifting realities from a downward to an upward spiral has made me more grateful and aligned me more towards shared prosperity. When I let my ego's goals finally die after 20 years of negative feedback loops, I found that the world picks up the slack so those goals happen anyway in a magnified way, which is manifestation.
What I'm trying to say is that if anyone is struggling with burnout, there's probably another cause which isn't apparent. For example, if you never have time to have a hobby anymore, it's probably time to set boundaries and communicate your needs. If you have no motivation for art or life goals, you might need to pencil active rest into your schedule, so that you give yourself a chance to become bored so you can hear your calling and discover a path to self-actualization. That peaceful source energy that's so abundant in nature is all but denied to us in the modern world where we can't even see the sky or hear a bird.
If that all sounds impossible, then those self-imposed barriers are probably attached to emotional trauma. Like if you're sacrificing your peace for a loved one, it might be time to do some shadow work to understand why you're overprotecting them from their own human experience and dignity. This can look like making the opposite choice than the one you have been making, and observing how reality reconfigures, who's blocking healing, who's helping, etc. It might be painful in the short term, but as each positive feedback cycle engages, it gets easier, and the other side is almost always better than what came before.