Usually, when you have created the work order, you'll need to assign it to either yourself or someone else.
Step 1. Go to the Work Order Details
Step 2. Tap Assignee
Step 3. Choose the people you want to assign work order to, including ownself.
Step 4. The assignee will receive a notification informing him/her that he/she is assigned to the work order.
Note: Work orders can only be assigned to members of the workspace. If the person you want to assign the work order to is not already a member, you will need to invite them to the workspace before you can assign them the work order.