If students are permitted extra time on timed pieces of coursework as part of their extended time adjustments, then you will need to set this up for any timed quizzes/tests on your course.
If you are a member of teaching staff, please ensure that you talk to the ITO about this before enabling it for any student on your course, as there are different types of extra time adjustments that a student may have and they will help clarify for your course how these need to be applied.
Below are links for how to add these extended time adjustments in the two commonly used coursework quiz/test platforms. For both Gradescope and Learn tests, you can set up an adjustment for a student that extends across a whole course and any timed assignments within that course or grant an adjustment just for one or more individual assignments.
Learn: Accommodations and Exceptions in Blackboard Ultra (with thanks to Teeside University for writing much better instructions on this than Blackboard itself provides)