We cannot answer the why's of Apple decisions here.
But they didn't really remove anything. I doubt the entry level 16e was ever planned to have the more advanced and expensive feature of Magsafe charging since its supposed to be a budget phone like the SE's before it which also lacked Magsafe charging. It also lacks other cameras like the 16, and lacks other features from its more expensive siblings
If you need or want Magsafe charging then you need to pay for it via a more expensive model that has it.
You can't actually expect all the features of the expensive models in budget versions.