The only truly ambi gun that I have ever seen is the Bersa Ultra Compact Pro. Many guns have ambi safeties but not slide releases. The bersa has an ambi safety, ambi slide release and the mag release can be switched to either side.
I do not use a slide release on any handgun. I have found that is is much easier to grab the slide and pull back. That is how I train. If you had to defend yourself with a gun you were not familiar with, you would not waste valuable seconds looking for a lever.
Romans 1:16 I am not ashamed of the gospel, because it is the power of God for the salvation of everyone who believes: first for the Jew, then for the Gentile.