To add new peds, use fastman's limit adjuster plugin.

Here is a tutorial:

https://www.youtube.com/watch?v=KSzGUf1qMMo&ab_channel=WhamDieMoe

Add this line into peds.ide file.

***, DNMYLC3, DNMYLC3, CIVMALE, STAT_STREET_GUY, man, 1, 0, man, 2, 1, PED_TYPE_GEN, VOICE_GEN_DNMYLC, VOICE_GEN_DNMYLC
***, WFYJG3, WFYJG3, CIVFEMALE, STAT_COWARD, jogwoman, 1000, 0, beach, 9, 9, PED_TYPE_GEN, VOICE_GEN_WFYJG, VOICE_GEN_WFYJG
***, OFYJG, OFYJG, CIVFEMALE, STAT_COWARD, jogwoman, 1000, 0, beach, 9, 9, PED_TYPE_GEN, VOICE_GEN_WFYJG, VOICE_GEN_WFYJG
***, WMOICE2, WMOICE2, CIVMALE, STAT_STREET_GUY, man, 1FFF, 0, null, 1, 4, PED_TYPE_GEN, VOICE_GEN_NOVOICE, VOICE_GEN_NOVOICE
***, SWFYBU2, SWFYBU2, CIVFEMALE, STAT_SUIT_GIRL, busywoman, 1000, 0, null, 4, 6, PED_TYPE_GEN, VOICE_GEN_SWFYRI, VOICE_GEN_SWFYRI
***, VWFYWA3, VWFYWA3, CIVFEMALE, STAT_SUIT_GIRL, sexywoman, E0F, 0, null, 1, 4, PED_TYPE_GEN, VOICE_GEN_VWFYWAI, VOICE_GEN_VWFYWAI
***, VWFYWA5, VWFYWA5, CIVFEMALE, STAT_STREET_GIRL, sexywoman, 1000, 0, null, 1, 4, PED_TYPE_GEN, VOICE_GEN_VWFYWAI, VOICE_GEN_VWFYWAI
***, WFYCLOT3, WFYCLOT3, CIVFEMALE, STAT_STREET_GIRL, woman, 1800, 0, null, 1, 4, PED_TYPE_GFD, VOICE_GFD_WFYCLOT, VOICE_GFD_WFYCLOT
***, WFYJOU, WFYJOU, CIVFEMALE, STAT_SUIT_GIRL, busywoman, 1000, 0, man, 9, 2, PED_TYPE_GEN, VOICE_GEN_WFYBU, VOICE_GEN_WFYBU

Don't forget to enter ID you want ped to have.