YES! This is a definite must-have for us. We have dual action links (e.g., Change | Remove) that are right-aligned. The text changes in the links depending on the forms and we need them to stack as right-aligned so we can use them in repeat grids. Right now, we can't use repeat grids with this if the text changes because we have to move the component back to the right which then moves all the rest of them in the grid, destroying the layout.

WORKAROUND:

I can't lie, I was really proud of myself for working this out...

Step 1: Rotate the Stacks -180°
Step 2: Individually rotate each item within the Stacks to 180°

DONE! Simple as that! Your items will now Stack from Right to Left!

Tip: Rotating can be done from the 'Transform' panel located on the right-hand side of the screen.

For the record, as with nearly every feature I have requested or voted on in this forum, you can already do this in Figma.
They don't use "stacked". Instead, they have frames with a powerful collection of Auto Layout constraints that allow the feature to grow in any direction.

This is a real ISSUE when it comes to languages that read right to left. Plus top right navs

I keep running into scenarios where it would be nice to allow right-to-left and bottom-to-top orientation of my stacks. I agree with comments below - this would make sense if it respected the responsive resize anchor options.

Please Adobe, make this happen as Thomas Dillan, suggested. Cheers.

I totally agree that this should be a feature, it's especially crucial for anyone working with RTL languages.

There's not even a need to add more buttons, just tap the vertical/horizontal stack button once select and the direction changes!

Agree with all the comments so far.

I had expected this to be a factor of the responsive resize and I'm very surprised that it is not.

If the elements in a group are set to be fixed right or fixed bottom, one would expect that the stacking would follow this logic and expand left or up accordingly.

I’m not sure if this function can change the direction. In short, I didn’t find it. The default direction is from left to right. If the direction can be changed, will it be better?

Actually, I'm looking for something different. Notice on the image that I need to pin the alignament on the right. This way I would like to have the chance to add new buttons to the stack and they be placed in the front of the stack, increasing the stack to the left. Did I made myself clear now?

The "Stack" feature added recently is very useful, it helps a lot when designing components, but it is still limited.

Today the default behavior is always to push the elements to the right, and this is not the correct thing every time.

The resource could have a way of defining which way the elements will be pushed, similar to the responsiveness control.

Example: In a navbar I have buttons that are fixed on the right, when updating the button text, alignment on the right is lost.

Attachments:
"Stack example - Master component.png" shows the master component and the configuration used.

"Stack example - instances.png" shows an instance of the component, the current behavior and the suggestion for improvement.