According the blog post "Spring Tools 4.11.0 released" by @Martin Lippert on June 21st there are
"early-access builds for Apple Silicon platform (ARM M1) available" for this 4.11 version.
However, there seem to be no findable places to download those. I've seen there are Eclipse downloads native for Mac ARM (aarch64), but no STS as far as I can see. Anyone know where these early-access builds for Apple Silicon are available?
You can get the early-access version of Spring Tools 4 for Apple Silicon from here: http://dist.springsource.com/snapshot/STS4/nightly-distributions.html
Due to a bug in the build scripts, the 4.11.0.RELEASE build for Apple Silicon ended up containing the wrong bits, so you should go with the nightly build for Apple Silicon for now.