Hi @Anonymous ,
Good days! Welcome to Q&A forum!
For your first question:
By default, Microsoft Search in SharePoint Online is managed by Microsoft and may not show “did you mean” suggestions like earlier on‑premises versions. However, you can work around this limitation by creating custom query rules.
Please follow the steps below:
- Sign in to the
SharePoint admin center
as a global or SharePoint administrator. - In the left navigation, select
More features
. - Click
Manage Query Rules
. - Click
New query rule
. - Create a query rule based on your needs and save the test.
Although this method does not "autocorrect" the query, it can improve your experience to some extent because Microsoft Search in Microsoft 365 does not provide full control over spelling correction.
For your second question:
There is currently no OOTB way to achieve this in SharePoint, and custom development using SPFX is required. The forum is currently more dedicated to solving general problems in SharePoint, and custom development for a full feature is not supported. If you are not good at development, you can consider going to the Partner Center for a customized experience.
Finally, if these features are not so urgent for you, you can submit feedback for them. This is the best platform to let us hear from you and make our products and services better for you and others. Microsoft values its customer feedback and a lot of features have been developed and suggested by customers via feedback.
I appreciate your patience and understanding.
Hope this information helps.
Please do let us know if you have any further queries.
Kindly consider accepting the answer if the information provided is helpful. This can assist other community members in resolving similar issues.