To get back to good night sleep of 8-10hrs , you can try not to allow her to sleep in the morning.. First try to reduce the daytime naptime gradually.. At 15 months she should be given proper home based foods .. mother milk not sufficient for her

Give timely meals and eat along with her to encourage healthy eating habits . Do not force food. No Screen below 2 yrs of age Before bedtime , no active playing , dim the lights , put some soft music or read books or a quick warm water bath may help.

At 1 year and 3 months, a child is transitioning to a more varied diet and developing sleep routines. Here’s a balanced approach for both nutrition and sleep habits: For Eating More & Nutritiously Offer a Variety of Foods: Include fruits, vegetables, grains, dairy, and protein. Try soft-cooked vegetables, small pieces of fruit, scrambled eggs, soft chapatis, idlis, and dals. Regular Meal Times: Aim for 3 meals and 2 healthy snacks per day to build routine. Self-Feeding: Let your child try finger foods. It encourages independence and can increase interest in eating. Avoid Force-Feeding: Allow your child to eat at their own pace; forcing can lead to refusal. Limit Junk & Sugary Foods: Too much sugar reduces appetite for healthy foods. Include Iron-Rich Foods: Essential for growth, e.g., green leafy vegetables, fortified cereals, and lentils. Hydration: Offer water between meals (not sugary drinks). For Healthy Sleep Habits Consistent Bedtime Routine: A predictable routine with calming activities (bath, storytime, dim lights). Regular Sleep Schedule: Sleep and wake times should be roughly the same daily, even on weekends. Comfortable Sleep Environment: Cool, quiet, and dark room with a comfortable crib. Daytime Naps: Around 1-2 naps/day. Total sleep for this age is about 11–14 hours (including naps). Avoid Screens Before Bed: Blue light can interfere with sleep. Reassure but Avoid Overstimulation: If the child wakes at night, comfort without making it a "playtime."

Encourage the baby to eat the food which you eat. Ideally at this age she should be eating the same food which everyone eats at home - so more of solids, only ensure the food is suitable for the baby to swallow easily. Should be soft to chew. Babies chew with their gums. Try to give solid food in the evening before bedtime- it will ensure stomach fullness.

Consult with Pediatrician physically for further evaluation and treatment

Try restrict the morning time naps

Kindly consult once physically to nearby pediatrician for examination