@Laurens van de Venn Thanks for reaching out. There is no limit on the number of workflows that you can create for the standard logic app as mentioned here. The best practice is to have 10-15 workflows per logic app resource as documented here.
This number can be changed as per the workflows that you have define (actions/triggers), how frequent your workflow is triggered as it depends on the utilization of your standard logic app resource.
Please 'Accept as answer' and ‘Upvote’ if it helped so that it can help others in the community looking for help on similar topics.