That's possible, I guess.
As you know, a thermonuclear weapon is extremely difficult to build; India has some of the best scientists in the world, and it's doubtful that India has produced one. Pakistan almost certainly has not. Nobody except the Soviets ever produced a thermonuclear weapon without significant help from either the US or US-Soviet proxies. [UK, FR, China, Israel.] The Sakharov-Ginzburg designs were inferior, but gave megaton+ yields. Eventually, [we think] they went to the Teller-Ulam design, but Sakharov surely understood fusion well enough to have developed it knowing only the basic concept. The Norks don't have a Teller or a Sakharov.
But they have Russian “helpers” I’m afraid.
“As you know, a thermonuclear weapon is extremely difficult to build; India has some of the best scientists in the world, and it’s doubtful that India has produced one.”
Dadgummit, I been tryin’ to build my own outa match heads, firecrackers and fat pine knots, guess I better give it up then.