It's also needlessly slow (considering M1). I suspect they have some optimisations designed for memory constrained devices like iPhone tuned in the same way for iPad.
Also ad blocker support is limited.
Oh and in a lot of video calling apps, if I try and browse something in Safari while the meeting is happening, then I'll suddenly stop sending video. Though that isn't strictly a Safari issue, more a Apple holding back features from third-party developer issue.