No. A plan is installed as an eSIM profile on one device, and that profile cannot exist in two places at once. Even where a QR code can be scanned twice, the plan can only be active on one.
What to do instead
Share the connection. Use hotspot on the phone with the plan and connect your other devices to it. This is what most people want, and it works for a laptop, a tablet, or someone else's phone. See "Share your connection with hotspot or tethering".
Buy a second plan. If both devices need to work independently, or you will be apart, buy a plan for each. You can buy both in one order.
For a tablet or a laptop
If the second device needs its own connection rather than yours, it needs its own plan, and it needs to support eSIM itself.
Moving a plan between devices
Moving is not the same as sharing. Whether a plan can be transferred depends on the eSIM, so check the app before you delete anything, and contact us if it is not clear. See "Deleting an eSIM, and when not to".
Watch the data
Everything a hotspot serves comes out of the same allowance, and a laptop can get through a lot without anyone noticing. See "Fair use and speed limits on your plan".