We should provide means for disabled people to work with the SI. That is first of all to switch to the deck per shortcut. A consistent proposal was made by Stuart in bug 99618 by using ctrl+alt+<number> for the decks. See also https://gerrit.libreoffice.org/c/core/+/99760 for the implementation. Secondly, we should allow screen readers to access the content. Not sure how much effort is needed for this. Basic interaction is per F6 to jump between interactive elements (menu, toolbar, sidebar, document), see https://wiki.documentfoundation.org/Design/Guidelines/SideBar for the guideline.
Moving to NEW
Shivam Kumar Singh committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/eef202b0659a8ef5f2c1d0b38f292039f0ceaa8d tdf#135334 Add keyboard shortcut to launch SI It will be available in 7.1.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.