Domain Metrics Deteoriation

Hey guys,
quick question: Do domains you buy and register, but not hosted yet lose their domain authority and metrics (TF, CF) over time? If so, can we get those back easily?

I'm asking because I bought domains for a client that initially agreed but decided not to work with me after. I'm thinking of reusing them for another client in the same niche. I'm talking two months or so - anyone know? Noob question I know!

I sent their support a query regarding this a couple of weeks ago. This is what they said:

Any expired domain will lose backlinks over time. Even if you build a new site on it some webmasters may choose to delete their link because your site no longer has the content they originally linked to. It's something you have to take into account when looking at the metrics of any expired domain - how much it will be affected by losing a few links. It's useful to look at the Majestic backlink breakdown to see how fast links are being lost.

Actually time works in favor of domains. Losing links is normal, but you'll be able to recover later. It takes around 3 months to get link juice back. But domain age is also a positive signal.

It's absolutely natural and it's not something you can have any control over. So don't worry too much about it.