A web-based tool in Microsoft 365 that enables users to quickly create surveys, quizzes, polls, and feedback forms.
Hi DajiaT,
Thank you for posting your question.
To clarify the situation, please note that Microsoft Forms does not automatically send a confirmation email for every submission. Whether a respondent receives a confirmation or receipt depends on how the form was configured by the creator. If the event organizer did not enable response receipts or create a notification workflow, you may not receive any email even if your submission was successfully recorded.
Since you have already reviewed Spam, Trash, Filters, and Blocked Senders, also check Promotions, Updates, and All Mail folder. You can try searching Gmail for terms such as forms, event name or the organizer name.
Hope this was helpful. Please reach out in the comments if you still need help in this aspect.