Kissing with tongue (aka French kissing) can be great, but it also isn’t something to just assume the other person is cool with. Remember: your tongue isn’t a sword, so don’t keep stabbing it at their closed mouth with a ton of force. Take it slow and kind of ease your tongue toward them.
If they seem good to go, awesome. If they’re not into it, let it drop. Have a perfect non-tongue kiss rather than ruin it with an awkward Frenching moment. You can always discuss future tongue kissing with them later.