Are external monitors worth it?

I recently bought a gaming laptop with 15.6 inch screen which is at the table 24x7. The laptop screen is of good quality 100% srgb 300 nits but I feel it is small since i keep it far as i use external keyboard and mouse. Is getting an external 27 inch 1440p monitor worth it for the larger screen size? Will it make gaming more immersive or something like that?