Cannot collect all images from gallery and send them to flow as attachments

[Ousselg]

Hi,

I am creating a expenses app and I am have 1 final issue.

I have a button to submit the expense and I attached a PowerAutomate flow to it.

Everything works well but I want to include all the images in the gallery as attachments in the approval email.

I tried collecting one image in a collection and that works.

[Ousselg]

If I use multiple pictures it doesn't work.

 I tried this:

Clear(Images);
ForAll(Gallery2.AllItems,Collect(Images,{Value: Receipt.Full}));Concat(Images,Value);
Set(Imagesvar,Concat(Images,Value));
'Approval-flow-Receipts'.Run(BrowseGallery1.Selected.Id,MyManager.Mail,Imagesvar)

It doesn't show any errors, but when pressing the button it says there is an error.

[Ousselg]

I looked everywhere on the internet and but no one seems to know how.

I want to include the attached receipts to a approval mail/flow. If I select one image it comes in the attachments, but when trying to add a collection or varbase64 it wont work. I have seen some videos about multiple attachments but those scenarios are when the files/attachments are all in one list. When I use the get content/get attachments scenario the files are not included there (because the images are stored in a list called "expenses receipts" and not in the "expenses" list. Because we have 2 lists and images that have the same receipt item name it's impossible for me to figure out how to do it. 

This is list a

and this is list b

I tried this methode as well:

But the item is on one list and the receipts are on another one, I can not get the content with this solution.

This is the submit screen with explanations:

This is the command that works (with one image only):

Approval-flow-ReceiptsV2'.Run(BrowseGallery1.Selected.Id,MyManager.Mail,Gallery2.Selected.Receipt.Full,Gallery2.Selected.'File name with extension')

I create apps for non profit purposes and would love if you could help me on this issue.