Question about Bridge edge loops I want to bridge the two following loops:

a figure $8$ (i.e. two polygons with a common edge)
a rectangle

After joining the two objects and applying the tool Bridge edge loops, I only get one circle bridged.
Does it mean that that tool cannot be applied here? How do I join then the two loops?

Here's the result:
Remove/dissolve the edge shared, or the one in the middle, and retry Bridge Edge Loops. Blender has problems with cases such as yours as a loop has to be a loop, i.e. is not supposed to be split. And the same number of vertices in both loops does result in better topology