Can Adobe Animate import .SVG exported from Affinity Designer? - YES.
The result will be a single group of whatever you chose at export (whole stage/area/selection)
Importing the SVG:
the default option is fine. I didn't notice any differences.
Any effects you have added from within Affinity Designer will be rasterized in Adobe Animate (did not test all effects)
layer names from Affinity Designer are lost
the layers/groups from your Affinity Designer file will be converted into groups within groups of nested objects.
Affinity brushes will be rasterized
strokes with a variable width will be converted to filled shapes in Animate
Objects with both a stroke and fill, will be converted to a grouping of the stroke and the fill as separate objects
Transparency from Affinity Designer appears to import correctly
clipping will import as masked layers within Animate. 👍
What you will import is a single object to the stage. If you were smart in your Affinity Designer layering/grouping you can proceed to meticulously rebuild your creation for Animate, if desired.
I usually select that object and Cmd-B (break it) one time. This leaves me my first set of layers/groups that I can then Cmd-D to distribute to layers (make sure all layers are selected) Next I take each of those groups and make them a symbol. Then I can edit each of those symbols by repeating the Cmd-B, Cmd-D steps within that symbols root until it's "ready" to be animated.
I'm basically converting the imported grouping from Affinity Designers Layers into the parenting hierarchy of Adobe Animates symbols.
Hope that made sense
Cheers!