NFC turn on

A layman answer would b YES with for longer run in brackets

It does but we talking very very minimal it would take u years and years on end for it to stop working on something positive 100 years depending on the quality of the component but with samsung phone I would say u shouldn't be worried about turning it off or it deteriorating

Just turn it off if you are not using it frequently

Same goes with wifi & Bluetooth i always turn them off when i am not using it

At least it save some energy from battery as well

The NFC sensor in your Samsung A34 5G is designed to be robust and durable, capable of handling regular usage without significant wear and tear. Keeping NFC turned on does not inherently degrade or damage the sensor. Modern smartphones, including the Samsung A34 5G, have sensors designed to be operational over long periods without deterioration.

Leaving NFC on continuously does not pose a safety risk to the device. However, for security reasons, it is advisable to keep NFC turned off when not needed, especially in public places, to prevent unauthorized NFC communication attempts.

For practical purposes, you might prefer to keep NFC turned off to avoid accidental interactions or to conserve battery life slightly. However, there is no technical need to turn it off regularly if you frequently use NFC features like contactless payments or data sharing.