There is a weird trick you can do with Noise Reduction that might help. The two clips are Normalized and Normalized with Noise Reduction.
I normalized to -3.5 to avoid having tiny sound values to work with. Note my raw sample is louder than yours. Normalize is a pure volume change.
Select the whole clip. Do not try to “find” the echoes.
Effect > Noise Reduction: Profile.
Leave the whole clip selected and apply Noise Reduction with the values 12, 6, 6.
Normalize to bring the volume back up.
If you reduce the first value lower than 12, it will just slowly stop working. If you go up, it will start sounding like a bad cellphone.
Someone on the forum discovered you could do that to get a little relief.
That’s all I got.
Koz