Also having what seems to be the same problem. Its my first time notarizing and app but i've been stuck for a few hours now.
Electron Forge as well, but also tried with Electron builder. Attempted to try with a small sample app (90MB) but its also stuck.
Running the notarytool history command shows my pending jobs
--------------------------------------------------
createdDate: 2023-09-06T14:49:59.810Z
id: ****
name: my-new-app.zip
status: In Progress
--------------------------------------------------
createdDate: 2023-09-06T14:31:08.880Z
id: ****
name: my-new-app.zip
status: In Progress
--------------------------------------------------
createdDate: 2023-09-06T14:10:23.726Z
id: ****
name: my-new-app.zip
status: In Progress
--------------------------------------------------
createdDate: 2023-09-06T13:54:35.527Z
id: ****
name: my-new-app.zip
status: In Progress
Since its my first time im not sure if its a configuration thing or bad timing. If something is wrong with the build it should properly fail with an error message right?