Yes, the Samsung Galaxy S10 Plus supports PUBG. It has an Octa-core (2.73 GHz, Dual Core + 2.31GHz, Dual Core + 1.95 GHz, Quad-core) Samsung Exynos 9 Octa processor and an 8 GB RAM.
Specs: Samsung Galaxy S10 Plus
NO, Samsung Galaxy S10 does not come with FM radio. Don't get dishearten, there are number third party applications available on the play store through which you can listen to your favorite radio stations easily. You can go for various available apps such as Next Radio, TuneIn Radio, iHeart Radio on the play store.
You can check here for complete product specification: Galaxy S10 Plus