I've been following the development of these pods (or ones very like them) for several years since I first came across them not long after covid (where shipping containers had been re-purposed). I think someone thought "Well shipping containers are crap, but they are about the right size and can be moved easily on lorries, so prefabricated off site. How about we build something that size, but build it properly?"
They're actually really well thought out. Adequately insulated (some of them are close to passivhaus standards), with a design lifespan of 50 years (so they're not shitty prefabs that are going to fall to bits after 5 years), and they've been very carefully designed in consultation with local authorities and homeless charities (so, for instance, the designs are set up to make it hard for third parties to engage in "cuckooing", where the local drug dealer moves himself into your bedroom and makes you kip on the sofa). They're also a very cost-effective solution.
These were the ones I first came across: https://solohaus.co.uk/