If you want to participate in international competitions and shine on the stage of the Royal Albert Hall, then, perhaps, it’s a bit late, but if you want to play for yourself, accompany your child/play in a band/get back at your neighbors, then no, it's not too late.
I love teaching adults. First of all, they practice more, they are curious about everything. They are responsible, they try hard, and they get nervous. After all, they chose this themselves. And they do quite well.
Yes, the biggest problem for an adult is to relax the hand, and many things need to be explained differently to them than to children. For kids, it happens automatically. Adults need to break it down into steps so that they do everything consciously. But it works, and the banker plays their favorite The Beatles, and the mathematician plays Bach. Adults don’t need to take exams; they play only what they love.
My oldest student was 82. True, he didn't practice for long because his children made him do it as a prevention against dementia, but he did quite well.
We live in an amazing time when "too late" no longer exists. There are only unfinished business and unfulfilled desires.