"not fully covered" is correct and usable in written English.
You can use it when you are talking about an object or event that has not received the complete attention, treatment, or consideration that is necessary. For example: "The topic of climate change was discussed, but unfortunately it was not fully covered in the meeting."
Outcomes evaluated soil lead concentration (employing a weighting method to assess acute hazard soil lead [areas not fully covered] and potential hazard soil lead [all soil surfaces regardless of covering status]), density of landscape coverings (6=heavy, >90% covered; 1=bare, <10% covered), lead tracked onto carpeted entryway floor mats, and entryway floor dust lead loadings.
If the artichokes are not fully covered, top up with water.
The 0.4% of accounts that are not fully covered contain more than half of all money on deposit.
But some banks, including those in Italy, have a funding shortfall; their loans are not fully covered by deposits.
Often, the cost of the drugs may be covered by insurance, but round-the-clock nursing care for patients is not fully covered.
They asserted in December that the prisoners are not fully covered by the Geneva Conventions; they did not rule out all protections for them.
The $400 million cost of the rebuilding, which was not fully covered by insurance, contributed to the company's bankruptcy filing in November.
She was fortunate that she could afford treatments not fully covered by insurance, hundreds of thousands of dollars' worth over the years.
Mr. Steinberg owned 29 million shares of Reliance at last report, but most of them were pledged to secure debts from three financial institutions, which are not fully covered at the stock's current price.
Some question whether it will be able to continue paying its annual dividend of €0.75 a share, which was not fully covered by earnings of €0.67 per share last year down from over €7 in the glory years.
Her laugh, along with the hospital's final bill — almost $16,000, not fully covered by insurance — suggested that I may have been better off in a different cultural context.
