Why a weaker German surface fleet jeopardizes the Norway campaign

Could Germany still take Norway without a strong navy in this alternate timeline?

It becomes much less likely because Germany lacks the ships, experience, and freedom to build the naval force that supported the historical operation.

Continuous British construction leaves the Royal Navy less willing to compromise through an Anglo-German Naval Agreement. German submarine building would then stand out as a direct Versailles violation rather than an activity partially regularized by bilateral agreement. A diminished surface fleet removes much of the transport, escort, and covering power needed for the Norwegian campaign. The strategic consequences extend beyond Norway because early exposure of German rearmament could provoke a stronger Anglo-French response before the wider war.