Yes, Tesco does sell CR2032 batteries. You can find them in the electronics section of most Tesco stores.
They come in a pack of two and cost £2.50.
The CR2032 battery is a 3 volt lithium coin cell. It is commonly used in small electronic devices such as watches, calculators, and keyless remote entry systems.
If you need a CR2032 battery,Tesco is a good place to buy them. They are widely available and reasonably priced.
Conclusion: Yes, Tesco does sell CR2032 batteries and they can be found in the electronics section of most stores. They come in a pack of two and cost £2.