No, these are not amazing achievements. Israel and the UAE (and Bahrain) have been building up back-channel relations and unofficial diplomatic and economic ties for DECADES, and these relations were going more and more above ground in the last 15 years (minus the Mossad snafu in '10).
These countries could've sealed the deal independently of the US except they knew Trump was such a vainglorious sucker, they figured they could get extra US-funded perks out of the whole thing by dangling very low-hanging fruit in front of him so he could feel good being included, claim some "achievement" for having Kushner witness a few signatures and, consequently, reward the involved parties with weapons & trade deals, investments, etc.
This isn't a criticism of the cynical machinery at work per se -- standard geopolitical quid pro quo really -- just of the overblown fawning that spurted as a result. The Nobel peace prize -- meant to reward diplomats, fighters and pacifists alike who've seen their way through a labyrinth of violence and injustice to bring some thawing inner light or modicum of peace to warring parties or to humanity in general -- should not be diluted by rewarding cynical geopolitical SOP, and esp. not reward lazy 3rd-party glory hounds who bumbled their way into the room where it happened.