Yes, but only when they enter the battlefield for the first time.
If you cast an eligible enchantment or artifact and Bello is on thr battlefield, then, as long as it's your turn, they enter the battlefield also as creatures.
When it becomes your turn and these permanents are already on the battlefield, but now become creates, they do not trigger ETB effects.
If they would trigger ETB effects when becoming creatures, then all zone changes would also apply, such as taking control over a creature an opponent controls.
I used Manjaro for about a year around 2019 and it was awful.
I liked its selling point on being based on Arch and having access to AUR, but the official repositories would only have stuff that is vetted to work on the current release of Manjaro (at least that's what I had heard about Manjaro at the time)
The amount of times a package update shit the floor is too many to count.
Before that I was using Ubuntu and for the most part it was fine.
The first distro I used was Mint since the desktop environments, Cinnamon, resembled Windows XP.
Yes, but only when they enter the battlefield for the first time.
If you cast an eligible enchantment or artifact and Bello is on thr battlefield, then, as long as it's your turn, they enter the battlefield also as creatures.
When it becomes your turn and these permanents are already on the battlefield, but now become creates, they do not trigger ETB effects.
If they would trigger ETB effects when becoming creatures, then all zone changes would also apply, such as taking control over a creature an opponent controls.