Labs.Azure.com provides a specific environment aimed at classroom scenarios. If there are 10 students that each use the VM for 10 hours per week, then you pay for 100 VM hours for that week, not 1680 hours.
If your requirement is better suited to a more fully featured Azure environment (needing more flexibility on VM’s and features) then you’ll find a larger selection of VM Sku’s available in using a full Azure subscription.
If you need the labs.azure.com scenario, but require additional features for your use case, then there is a feature suggestion area here : https://feedback.azure.com/d365community/forum/502dba10-7726-ec11-b6e6-000d3a4f032c