Is the Yoga 9i good for gaming?

Only for light and older titles. It uses integrated Intel Iris Xe graphics with shared memory, so modern games will run at low settings or not at all. A laptop with a dedicated GPU is the better choice for gaming.

Can I use it as a tablet?

Yes. The 360-degree hinge folds the screen all the way back into tablet mode, and tent and stand modes work for watching video or presenting. It is heavier than a dedicated tablet, so long handheld use is tiring.

How long does the battery really last?

Lenovo rates it at up to 15 hours, but that is a standby figure. Expect noticeably less in real mixed use with the screen bright and several apps open, and less again when streaming video.

Does it have USB-A ports?

The listed ports are USB-C and a headphone/mic combo jack. If you use USB-A accessories, plan on a USB-C hub or adapter.

Is the 1 TB SSD enough?

For most people, yes. A 1 TB SSD holds a large photo and document library plus a good number of apps and games. Video editors and large game libraries may want external storage.

Is the webcam good for video calls?

It is a 720p HD camera with a privacy shutter. That is fine for everyday meetings but softer than the 1080p cameras on several premium rivals, so good room lighting helps.