If your sentence begins with there and the subject follows the verb, you need to pay special attention to subject-verb agreement. If the noun following there is singular, the verb should be singular.
There have been much advancement in prostheses in recent
years.
There has been much advancement in prostheses in recent
years.
--Linglei Xu, "Bone Talk," SciTech Magazine
If the noun following there is plural, the verb should be plural.
There is many ideas of how to organize
assemblers.
There are many ideas of how to organize
assemblers.