90 yr mom in AL calls me 5 to 15 times a day says I'm so lonely no one to talk to. Can't convince her to get away from tv news out of apt.

If there is dementia involved at all, then there is no more initiative.

Having someone walk her to an activity might be a way to start. Her brain may not be able to GET HER to an activity, even when invited.

Does the facility host events and activities? Does it have clubs? I would contact admin to see if they can proactively invite her to some of these things and knock on her door to get her out. If she's depressed you might want to consider meds to help her to cope. My aunt takes them and they help her a lot.

Stop answering your phone. Let her calls go to voicemail. Your mom will eventually get the message. And you probably need to cut your visits back to just once a week. You can drop off anything she may need at the nurses station, without having to go see her if needed before your weekly visit.
You are now allowing yourself to be your moms everything. That's not fair to you, nor is it feasible. Only you can make the necessary changes to change things. Hopefully with you being less available, mom will start leaving her room and interact with the nice folks at her facility, and won't be so lonely. But as long as you're always at her beck and call, she will never change, nor will she feel the need to.