You cannot access transport logs, with O365 being a SaaS service and all. You can however get additional details from running detailed message trace, and the extended message trace: https://learn.microsoft.com/en-us/exchange/monitoring/trace-an-email-message/message-trace-modern-eac
Here's a sample output from the detailed trace:
Detail : Message received by: PA4PR03MB7183.eurprd03.prod.outlook.com using TLS1.2 with AES256
Data : <root><MEP Name="ConnectorId" String="PA4PR03MB7183\Default PA4PR03MB7183"/><MEP Name="ClientIP" String="2603:10a6:20b:31e::22"/><MEP Name="ServerHostName"
String="PA4PR03MB7183.eurprd03.prod.outlook.com"/><MEP Name="FirstForestHop" String="PA4PR03MB7183.eurprd03.prod.outlook.com"/><MEP Name="DeliveryPriority" String="Normal"/><MEP
Name="ReturnPath" String="QnA-bounce@microsoft.com"/><MEP Name="CustomData" Blob="S:ProxyHop1=VE1EUR02FT023.mail.protection.outlook.com(10.152.12.132);S:ProxyHop2=AS8PR04CA0107.o
utlook.office365.com(2603:10a6:20b:31e::22);S:tlsversion=SP_PROT_TLS1_2_SERVER;S:tlscipher=CALG_AES_256;S:OriginalFromAddress=QnA-bounce@microsoft.com"/><MEP
Name="SequenceNumber" Long="0"/><MEP Name="RecipientReference" String=""/></root>