He was an 18th round pick in 2019 and didn't get his pro career underway until 2021 so definitely flew under the radar until he hit the ground raking. FanGraphs did have him #18 on their 2022 Twins list with this capsule summation to close his report...
Patient bordering on passive, Julien’s bat is what will carry him to the big leagues. He could end up tracking like Josh Rojas, who was also not a good defender but ended up playing several positions, kind of like a blunt Swiss Army Knife. Julien has played first, second, third, and in left field, and projects as a bat-first platoon role player.
They then bumped him to #3 on their Twins list and #82 overall with a 50 FV entering 2023 before graduating. Looks like they were the high outlet on him though as BRef doesn't list him making any other Top 100 lists.