Nap time for 3 months

Hi mummies! Would like to get some advice… my 2 months bb will be turning 3 months soon. Her nap times nowadays have been very short, at most 30 mins… what can I do to increase her nap time? It’s so frustrating sometimes because she nap so little… she used to be able to sleep 2-3 hours. However, she has been sleeping well at night though, we usually put her to bed at around 7.30pm-8pm and will wake up at 7am or so with feeds in between the night. Any advice? :’)#FTM #pleasehelp