Short list of things for which the Shari’ah does not provide an explicit solution:
Tariff policy
City planning
Nasal congestion
Industrial versus residential districting
Inflation
Public transportation policy
Athlete’s foot
Agricultural subsidies
Corporate tax
Trade imbalances
Acne
Defense spending
And yes, the list goes on…and on.
I am only being partially facetious …
Now, you may be able to cite ayaat or hadiths which you can apply as a kind of principled guidance on how to approach these matters, but that will come down to one’s own interpretation; which just makes my point that Islam provides guidance, but not “solutions” for every single conceivable issue in life.
A further point needs to be made here, that you do have to distinguish between explicit rulings and advice in the Qur’an and Sunnah. If you conflate the two, you are extremist by definition. The matters about which Islam imposes explicit rulings are very, very few; whereas there is an enormous amount of advice and principles by which people can be guided, but which are not legally binding.
No, Islam does NOT provide a comprehensive absolute system for human life, with every possible personal, social, and political matter regulated by the Shari’ah. No one claimed this until the Islamists tried to turn the religion of Allah into a political ideology; and no knowledgeable religious person should be offended when this concept is refuted.