Hi, @XrandallX and welcome to the forum!
Can you please share the output of qiime info? It looks like the min/max length parameters were added to extract-reads in the 2018.11 release. You are viewing the 2020.2 release version of the docs, according to the URL you shared above.
I recommend viewing the documentation which corresponds to the version of QIIME 2 you are using. From qiime info I can see that I am using QIIME 2 release 2020.8:
➜ qiime info
System versions
Python version: 3.6.11
QIIME 2 release: 2020.8
QIIME 2 version: 2020.8.0
q2cli version: 2020.8.0
You can then use the drop down menu on the left side of the QIIME 2 docs to select the correct version:
I hope that helps! Let us know if you have any more questions 