Tasha's had 4th level Summon Construct, which wouldn't be legal at most tables since it was reprinted in the 2024 PHB, but also it was actually listed in the new Eberron book as an Artificer spell so no issues there.
The 3rd level spell Conjure Constructs is what should presumably be listed as an Artificer spell, but is not. The spell is absolutely awful though so it really doesn't matter. 3rd level spell doing 3d6 single target damage or 1d6 + Spellcasting mod temp HP, requires concentration, and is repeatable each turn if you use your entire action for it. It's crazy how underpowered that is compared to other 3rd level spells, and really makes you question whether WotC is even paying attention to what they publish