Your only option is to ask the city/county to extend a variance to the time given the pandemic. We have lost 4 months or more due to government shutdowns in factories and their suppliers.

There is no short cut to septic. Try to get your system inspected. You may have a very sub par system and it would be better to fix the system now and have peace of mind foe the next 30 years.

New systems in our ares are $10.000+. Having an engineered system can cost $20,000 to $30,000