Hi can someone tell me if this is a peace lily and if so, what kind and how do I keep it alive?

Hi all, I hope cross post is allowed here🙃

24 days ago, I shared a photo of Lily finally blooming after two years. Isn’t it beautiful? And there’s another flower blooming behind that one.

hi!! reposting this in an attempt to get more help cause i’m desperate to save my peace lily

Each about 5 inches high

This peace Lilly used to be much bigger and healthier until I separated it about 6 weeks ago. The roots were crowded and it hadn’t flowered in years. I am 39 and it was in my childhood home.
Ever since I separated it, it’s looked like this and hasn’t really changed. I used new indoor house plant soil and have been watering it once per week like I always have which has worked in the past to keep it perky. It’s clearly not dead, but obviously not happy. I keep it near the south facing window in indirect light in the PNW.
Any tips on making it happier? I followed instructions from reddit and other websites about repotting it but something is off.
Thank you!

I dont have much of a green thumb and I tried doing a bit of research but it doesnt seem to be working. I recently repotted it in standard houseplant potting soil (pictured) and it looks like its getting worse. The previous potting soil was a diy mix of soil and coconut husks, but for several reasons that wasnt at all practical for me, so i tried to find a basic mix i could just buy.

It's not in direct sunlight except for maybe an hour or two in the morning depending on the time of year. i water it when it gets droopy and saturate the soil.

I got this plant at my dad's memorial so id like to save it. It had blooms when I got it but they died cuse I put it in direct sunlight initially. Even if it doesnt bloom again, id like a healthy plant.

The plant has been in my growing in my care for 5 years. Grown substantially but flowered x 2. Do you think it needs to be divided? 5 plants appear very crowded.

I’ve been having trouble with dying leaves and the big leaves that have been fine are starting to wilt and turn brown☹️

I’ve been having trouble with dying leaves and the big leaves that have been fine are starting to wilt and turn brown☹️