Yes, you can automatically add all DHCP clients to the Simple Queue on MikroTik RouterOS by following these steps:
1. Go to IP > DHCP Server and select the DHCP server you want to configure.
2. Under the DHCP Server settings, click on the "Script" tab.
3. Click on the "Add" button to create a new script.
4. Enter the following command in the "Source" field:
/queue simple add name=client-${lease-hostname} target-addresses=${lease-address} max-limit=1M/1M
5. Click on "OK" to save the script.
This script will automatically create a new Simple Queue for each DHCP client that connects to the network with a bandwidth limit of 1Mbps download and 1Mbps upload.
Note: Make sure to test the script and adjust the bandwidth limits to the appropriate values for your network. Also, keep in mind that this method may not work for networks with a large number of DHCP clients or complex network setups.