Is it normal that my ex and I are friends so soon after breaking up?

I'm just looking for some feedback because I've gotten mixed reactions from friends and family.

My "ex" and I dated unofficially/not exclusively for around 4 months. We never had any explicit convos about being official but we might as well have been- talked every day, met eachothers families and friends, travelled together, etc. Right as things seemed to be getting relatively serious there was a huge misunderstanding that left him feeling hurt/betrayed and me feeling frustrated and confused. It's a long story but it resulted in him losing some trust in me and things not being the same as they were. It also resulted in his circle (friends and family) thinking differently (negatively) of me.

This event misunderstanding happened about 3 weeks ago. We didn't talk for 2 weeks, and then began to talk last weekend. I was the one who reached out as I was really hurting without him and wanted to give things another shot, or at the very least clear the air. Well we did, for more than an hour, and understood what happened a lot better by the end of it. There are still some points where we don't agree and he still doesn't have the same level of trust in me (at least for now, I guess- hopefully that will change), but we mutually agreed to be friends (completely voluntary and both of us want to). We haven't been texting or talking on the phone like we used to but we Snapchat a few times a day (not like we used to either) and send eachother some things on Instagram (not at the same frequency as we used to). He told me that he wants to see where being friends goes and how much we talk, but that he's not seeking anything romantic. I didn't ask him if he still had feelings for me but I'm assuming not if he doesn't want to pursue dating again? Idk.

So, I was just wondering- is this normal? I've never done this with any of my exes and my friends and family have been giving some mixed feedback so I'm just curious.