No, this is normal. Since 2020, SketchUp has moved to subscription licensing that doesn't use serial numbers or keys. You activate the software by signing in with the email address associated with your purchase.
: New users must purchase an annual subscription. Activation is handled by signing into the software with the email address used for the purchase (Trimble ID). Perpetual Licenses Discontinued sketchup pro 2023 license key new
Perhaps the most significant feature for professionals working in collaborative environments is the upgraded Revit Importer. Previously, moving from BIM (Revit) to SketchUp was a messy process involving intermediate formats like IFC. No, this is normal