Hello @Meiti,
Welcome to the forums! :qiime2:
The Qiime2 team ships trained classifiers for V4 and full length 16S amplicons on the data-resources page, but like you have already noticed, there is not one provided for V1-V3.
But no worries, you can train this classifier yourself using the RESCRIPt plugin.
Let us know if you have any questions about running this plugin!
Colin