Looking for an Open Source Project or even the paid one

Hello Indie Hackers,

We are in search of a ready-made open source Stall Management and Event Management Platform that we can use to manage all types of events. Our ideal platform would include the following features:

Stall Management:
a) Ability to select from a variety of stall types before booking.

Stall Booking:
a) Online booking with the option to use Payment.

Event Management:
a) Create and manage events, including speaker and attendee management.

Speaker Management:
a) Create and manage speaker information for events.

Online Ticket booking for Attendees:
a) Various types of tickets will be available for purchase.

Ticket tracking at entry gate:
a) Use QR code scanning or other method to track ticket at entry.

Optional : Room booking

We would greatly appreciate any recommendations you may have for open source projects or even a paid one that meet these specifications. Please let us know if you know of any projects that we should take a look at.