The barrier to entry isn't the tech (which is why I don't think that this is really a tech firm). The barrier to entry is the relationships with the restaurants and the riders (and advertising to get people to use it)
But that is of course a minority of customers, especially amid a pandemic. (But then again, with restaurants closed, for the ones who travel ...)
I assume they either cut kitchen staff and only have a very basic (boring) offering to cut costs or add some fantasy label to make use of their kitchen and offer delivery themselves as new revenue stream. Then the deliveroo rider could ride on the elevator instead of their bike ;)