GF doesn't read texts until she messages me... 24 hours later.

Me and my gf have a routine where we message eachother every night. However, we usually send eachother blocks of paragraphs a lot of nights since we both are available at different times (usually takes us 20-40 mins to type). But, on nights where I'm sending my paragraphs last... she just never reads them. She never takes a few seconds to even click on the app and see how my day went :(

And, our convos are totally okay too when we talk back and forth too some nights. But idk... I can't fathom how she waits so long because I love reading here messages over here! I can't wait to see them the next day because I just wanna know how her day went, and what other things she has to say! But, she doesn't read mine until the next night. 😖

And, she has her phone on her all day too. Also, I'll send her good morning texts sometimes, but that's the only time she reads my convo that early usually.

I don't know.

Edit: Also, it's not totally expected for her to read the message either! We only communicate at nights usually... it's just, I don't understand how she doesn't have the urge to check my messages during the day to read them instead of waiting 24 hours.

Edit: We've also been dating for over a year, and she's always been like this too