Swedenborgism denies the existance of the devil - hence no hell. Some have said 'borg taught that hell was just a tempral experience.
Then again - 'borg taught a great deal about “conjugal love” - hmmmmmmmm
Swedenborg denied the existence of the devil, but wrote a whole book on Heaven and Hell, so hell did have some kind of existence for him.
That's all I could find out in a few minutes, but if Swedenborg was a mystic, it would be hard to say just exactly what he did believe, since mystical or visionary writers can be read in different ways. A mystical experience doesn't always translate easily into dogma or a logical system.
The other problem is that what 21st century religions believe and what their founders believed aren't necessarily the same.
Hell is under the Lord's kingdom - individuals there pervert His Divine Love and Wisdom into evil and falsity, as people do here. I believe hell to be eternal.