Monitoring child’s text messages

8yo daughter, split from her mom for 5 years. She has recently been given texting apps by her mom, two separate ones. Her mom does not monitor what she texts or who but I have been told, by my daughter not her, that she only has a few friends she texts that she named. Her mom never even told me she was giving her the messaging, I just started receiving texts from my daughter one day. My question is do you monitor your kids text messages at that age? I’m concerned with what the content may be, because I don’t know all the friends who have it, and also anyone outside being able to message her. It’s so easy for your email to get picked up these days when you’re on the web. To note: she is not on any cell plan. I just don’t like the idea of not having any one monitor it at her age.