In PS is it possible to have multiple adjustments in only one layer?

Thanks for all the answers! I found that I can convert a layer or group into a smart object, then press `CMD Shift A` to add and edit a Camera Raw filter on a selected smart object.

Yet another way is to take advantage of layer groups in Photoshop. If you put those adjustment layers in a layer group (use the Layers panel button that looks like a folder, or the command Layer > Group Layers), you’ll be able to work with those as a unit, like hiding the entire group at once, or applying a blending mode to the group.

Another way is to turn the layer you want to apply the adjustments to into a Smart Object, then you can use Image>Adjustments for what's called Smart Filters.

https://helpx.adobe.com/photoshop/using/applying-smart-filters.html

Hey there! Welcome to the Photoshop Community. I'll help you get started with this.

You can use the Camera Raw Filter in Photoshop. To work non-destructively, go to the Filter Menu > Convert for Smart Filters > Go to Filter and try using Camera Raw. Head here to get started with Camera Raw:

https://adobe.ly/3F9fwXF;

Here is a video we did to help you get started with Camera Raw: https://adobe.ly/3QIfhFB;

Let me know if this helps. Thanks!