Please check out this article: https://help.salesforce.com/articleView?id=creating_object_specific_actions.htm&type=5
Go to the Object Settings for your Rental Request object
go to Buttons, Links, and Actions.
Click New Action.
Select the type of action to create (Create a record)
Customize the action.
For a Create a Record action, select the type of object to create.
If the object has more than one record type, select the one you want to use for records created through this action.
Also, refer to below thread with similar requirement: https://developer.salesforce.com/forums/?id=9060G000000UTvbQAG https://trailhead.salesforce.com/trailblazer-community/feed/0D54S00000A8Jh1SAF
Hope above information helps. Please mark as Best Answer so that it can help others in future.
Please check out this article: https://help.salesforce.com/articleView?id=creating_object_specific_actions.htm&type=5
Go to the Object Settings for your Rental Request object
go to Buttons, Links, and Actions.
Click New Action.
Select the type of action to create (Create a record)
Customize the action.
For a Create a Record action, select the type of object to create.
If the object has more than one record type, select the one you want to use for records created through this action.
Also, refer to below thread with similar requirement:
https://developer.salesforce.com/forums/?id=9060G000000UTvbQAG
https://trailhead.salesforce.com/trailblazer-community/feed/0D54S00000A8Jh1SAF
Hope above information helps. Please mark as Best Answer so that it can help others in future.
Thanks.