You can use a different keyboard than the default AOSP keyboard with more modern features including but not limited to swipe typing. We plan to replace AOSP keyboard with a fork of a more modern app but there isn't yet one meeting the functionality requirements which is under a license we can use. FlorisBoard is what we have plans to eventually use, although it might not be what we end up using.

Check out FUTO Keyboard, It has swipe-typing feature.