We met during Covid, then had a busy few years of moving, changing jobs, have our baby.
I still don't understand how you didn't realise how little you had in common. Covid should have been the perfect opportunity for this given how much time you were spending with each other.
You're not the first and won't be the last couple who plunged headlong into Life Stuff to distract yourselves from your incompatibility, I guess. But you can't magic up "things in common" where none existed in the first place ("discovering new bars" doesn't count, it barely counts as a proper interest unless you're actually in that industry).
I'm also not sure what you mean by "we love each other" to be honest. I don't doubt that you care for each other and don't want to hurt each other - I feel like that about most of my friends. Romantic love isn't just a feeling though, it's about action, and one of the most important actions is to enjoy spending time with each other. Couples don't have to have everything in common, or even a lot in common, but the Venn diagram has to intersect somewhere.
I really don't mean to be rude but when I think back to when I was dating, and the amount of perfectly nice men I moved on from because we had too little in common, I just don't understand how that's not at the forefront of your mind when you're getting to know someone.