Need suggestions to replace Adobe Aero

I can highly suggest Scenery.

It's as easy to pick up as Aero and migration of the projects is pretty straightforward. It has quite a lot more advanced creation capabilities though while keeping key features like App Clips (share experience without app download), Geoaspatial + VPS, multiple anchor types, physics, custom shaders, Vision Pro support, and a few more.

The only downside I see, currently you need a Mac or iPad to create.

Their team is working on a webXR player however, to make experiences accessible on Android soon.

Hope this helps.

Take a look at Hoverlay (full disclaimer, I am one of the founders....). Hoverlay has a free tier and a great program for artists (the Creators And Ambassadors program) https://www.hoverlay.com/creators-ambassadors-program.
It's used a lot by faculties teaching Arts and New/Immersive Media  (Northerstern, CSUN, Emerson, MIT, Berklee College,...) and they are EDU packages. 

I teached varous AR Tools the last 2 years in Potsdam UoaS and so far we worked with these:

Meta Spark:

obvously not an alternative.

Unity:

extremely capable but not easy to use, requires App Download for Users and Pro License for creators. Cross-Platform. Coding needed. Will take about 2-3 months to create a first project when learning from scratch.

Scenery:

high capabilities. more functionality then aero. low subscription costs. AppClip support - so no app download. Mac/iOS only.

Artivive:

very easy drag and drop editor. low capabilities and intearction possibilities. Low costs. App-download needed. Cross-Platform.

Lens Studio:

medium hard to learn when using templates. Deep learn 1-2 months. high capabilities. App-Download needed. Users will need a Snapchat account. Cross-Platform.

MywebXR:

Its web XR so no app download but feels still buggy. Only tap interactions as far as I tested.

So far Scenery is definitely my suggestions for Creators shifting from Aero. Feels pretty intuitive, there is no coding needed but possible. It can process mp4 files wich is awesome and you definitely get a feeling for the possibilities of AR/XR.

You can find almost all interactions from aero here and many more. 

Its iOS/Mac only but in my field of creation most museums can get iPads for their exhibitions and most users have an iPhone anyways so thats not really a downside for me.

Hope that helps 😃

I've been looking around and 8thwall looks very cool, involves some coding perhaps but it works in the browser on my Android phone, making it very accessible. The portals you can create in the world AR is amazing 

https://www.8thwall.com/products/world-ar

There's Artivive too, but the AR pieces have to be pretty small, like under 5MB for 3D files with a pro account. Not ideal.