You’re right to ചോദ to question that. My earlier statement was too broad.

In mainstream Jain dietary guidance, beans and lentils are generally permitted, not broadly avoided. Jainpedia explicitly says Jains eat “bread, lentils and most vegetables and fruit” while avoiding meat, fish, root vegetables, eggs, honey, and fermented foods. ( jainpedia.org)

Jainworld likewise lists beans and peas among foods Jains eat, and another Jainworld page refers to dry beans, peas and lentils as part of Jain food habits. ( jainworld.com)

So the accurate statement is:

• Lentils and beans are generally allowed in Jainism.
• The foods commonly avoided are root vegetables, eggs, meat, honey, alcohol, and certain fermented foods. ( jainpedia.org)
• Some Jains may avoid sprouted forms or very specific preparations, depending on tradition and level of observance, but that is different from avoiding lentils/beans altogether. ( jainpedia.org)

If you want, I can also give you a clean Jain food list: allowed / avoided / tradition-dependent.