You only dated him for a few months before lockdown started. You became exclusive in January, but lockdowns started happening about 1-1.5 months after that. You didn't have enough time to screen him. Right now you don't know who he really is, even though you've technically known him for several months.

However, all the things you wrote in this post suggest he is not HV. Maybe he's breadcrumbing you because he's lonely and is unsure when he'll find someone new. If he was a HVM, he would tell you that he doesn't want to date during this time, that he can't date virtually, that this isn't working etc. The fact that he's not ending things yet puts no effort into the relationship, suggests he is a typical scrote.

If you don't want to totally write him off-- still end things. Don't let him think you're so desperate and optionless that you'll cling to this online relationship for months. Work on your interests, hobbies, work, house etc during this time. Tell him you're busy and don't have time for this anymore, but that you'd consider dating in person once coronavirus is under control and lockdown is lifted. That is, if you're even interested in him then.