The phrase "addressing the extent" is correct and usable in written English.
It can be used when discussing the scope or degree of a particular issue or topic that needs to be considered or dealt with.
Example: "In our report, we will be addressing the extent of climate change impacts on coastal communities."
Alternatives: "considering the scope" or "tackling the degree".
The members avoided addressing the extent of their own complicity in any crimes.
Hillary Clinton doesn't detail the scale or structure of the fee beyond addressing the extent of short-term funding.
Momentary ruminative self-focus was assessed using a two-item measure addressing the extent to which people were focused on (i) their feelings and (ii) their problems.
Table 4 shows the results of analyses addressing the extent of use of low- and high-cost supermarkets within the low-cost, high-cost, and all-types supermarket choice groups.
Finally, each survey contained a global rating of care and a question addressing the extent to which a patient would recommend his or her healthcare provider to family and friends; both were included in the analyses for the present paper.
Neither company addressed the extent of its cooperation or how widespread the practice was in the industry.
In two cases, the court will address the extent to which whistle-blowing employees are shielded by federal statute.
The OECD doesn't do enough to address the extent and scale of harmful tax competition among richer countries and the effects on developing countries.
He also did not address the extent of any taxpayer subsidies or other government guarantees that may be used to entice private investors to participate.
The policy should address: The extent of personal use that is permitted in work time and on work devices Employees' human rights.
Asking that question brought to mind still another case, one that directly addresses the extent to which professional training and one's personal moral convictions can be compartmentalized.
