External enclosure for my retrieved ssd hd taken from my old A1708 MacBook pro

There's not enough information here to know for sure what you have. A1708 covers a number of different models from 2016-2019.

But I'm going to guess that you have a late 2016 non-touchbar MBP. Does your SSD look something like this ->

If so, it's a proprietary NVMe SSD. I searched and could not find any enclosure that would fit this drive.

You might call OWC and see if they have any suggestions.

Aside: You need to get in the practice of making backups.

If you had a current backup now, it wouldn't be that important to get an enclosure that might not exist for your old SSD.

There will be no pulling out of the SSD HD [sic] from the new MacBook Air. The flash chip or chips containing the data are soldered in. Even if they weren't, most of the data bin them is encrypted using keys held by the M2 / M3. Separate the flash chip(s) from the encryption key(s) and the encrypted data might as well be so much hash.

MEIKO wrote:

Has to be an easy way to ensure latest info is recorded?

Your best bet would be to get a good external SSD and set up Time Machine to automatically back up your new MBAir.

Here are a few suggestions:

• OWC Envoy 1TB
• OWC Express M2 1TB
• Seagate OneTouch 1TB