I don't think as much progress has been made, as would perhaps have been made if she hadn't been distracted at times by issues such as the terrorist attack by an Australian on the Christchurch mosques, murdering 51 people, the eruption on White Island, and of course, Covid. Being in coalition with New Zealand First was not helpful, either.
She now has a clear run, and she does need to make progress on her aims and promises, and it's clear that she knows that.
This does have to be balanced with recognition of the economic impact of Covid, of course.
With reference to the Covid-19 response, what Ardern did, was to do the best with what she had. She made full use of the geographical advantages NZ enjoys. She was transparent, honest, and respectful of people, clear about what she was asking, and why, and acknowledged the costs, financial and otherwise, that were being borne by people in following them. She made it clear that as the team of 5 million no-one was above the rules, and wouldn't be held accountable if they transgressed them.
She consulted widely (with education for example), listened, and therefore had support from the sector, and they in turn were supported to deal with the challenges they faced.