'more attached to' is correct and usable in written English.
It is used as an adverb and functions to modify the verb in the sentence. For example: She was more attached to her old home than her new one.
You are more attached to it.
"Employees will earn more and be more loyal, more attached to their jobs," he said.
"The topography of where you live changes and you feel much more attached to it.
Since I was on a bike, I felt more attached to the ground.
Would we then become more attached to these products?" Good question.
"It's much more attached to kinship with other Muslims," a senior administration official said.
"My husband had been more attached to me than I thought".
"California is more attached to the green movement, so they are more willing to try this service here".
The only reason it isn't a five star review is because I wish I had felt more attached to Tella.
This part of eastern Ukraine has always felt more attached to Russia than to western Ukraine and neighboring Poland.
"I feel more attached to some of these people than the people I knew in high school," he said.
