No. The IEP team is required to develop an IEP that meets all your child's needs, regardless of "what's available" at the school.
The school must comply with the legal requirements for IEPs. The services "available" or the delivery system is irrelevant.
Your child's IEP must be individualized.
"What we have available" usually refers to a one-size-fits-all program that is not individualized to meet a child's unique needs.
The amount of a special education or related service the school provides only may be stated in the IEP as a range (e.g., speech therapy to be provided three times per week for 30-45 minutes per session) if the IEP team determines that stating the amount of services as a range is necessary to meet the unique needs of the child.
The school may not use a range because of personnel shortages or uncertainty regarding the availability of staff.