Item Effects in Pathfinder 1e

[Laukai]

I have several items equipped on a character, like Cloak of Resistance +2, Ring of Protection +1, Necklace of Natural Armor +2, and Headband of Vast Intelligence +2... None of the bonuses seem to be displaying anywhere. Any advice to figure out why these items don't seem to be doing their job?

[Kelrugem]

They do not do that automatically :)

You have to add them as effects in the combat tracker :) What I normally do: Create a new "spellclass" (don't hang up on the name, this is for all sort of actions and effects :)) and I name that "items"; add new actions with effects resembling the worn magic items :) Then the players can click on them (make sure the effect is on [SELF]) to easily add these effects to their character :)

For AC: There are different bonus type boxes in the character sheet, so you can track magic items also in the sheet when it is about AC :) (but you have to type these in manually; these numbers are also respected when it is about magical effects coming from the CT. Skills etc. sadly do not have these type of bonus boxes in the sheet)

[Moon Wizard]

Some of the character attributes have a breakout where you can enter various "modifier" types (such as AC, saves, attacks); but not all (ability scores have no break out).
The way I've usually handled is to just adjust the PC's attributes when they wear it; and adjust them back when they take off. If it's something that is not always on, then an effect would be in order as Kelrugem mentioned above.

Regards,
JPG