Are all lay followers shravaks
Yes — in Jainism, lay followers are generally called śrāvakas in the male form, and śrāvikās in the female form.
- Śrāvaka = a male lay follower of Jain Dharma
- Śrāvikā = a female lay follower of Jain Dharma
A lay follower is someone who follows Jain principles while living a गृहस्थ जीवन (householder life), unlike a sādhu/sādhvī who has taken full renunciation.
So, all lay followers are śrāvakas/śrāvikās, but the term śrāvaka specifically refers to the male form.